How to Clean Your OTG Oven Inside Out: A Complete Maintenance Guide

You made paneer tikka last night, baked a cake over the weekend, and toasted garlic bread for an evening snack. Your Oven Toaster Griller (OTG) handled all of it without complaint. But now the inside tells a different story: grease splatters on the walls, crumbs stuck to the tray, and a faint smoky smell every time you turn it on. Cleaning an OTG oven at home takes about 30 minutes, no special products needed. A damp cloth, mild detergent, warm water, and a paper or cloth towel do the job.

Here is a step-by-step breakdown for every part of your OTG, along with maintenance habits that keep it running well for years.

What Do You Need Before You Start Cleaning?

Before you start scrubbing anything, gather a few basic supplies. Most of these are already sitting in your kitchen.

• Mild dish detergent
• Warm water
• A soft, damp cloth (non-abrasive)
• Paper towels or a clean cloth towel for drying
• A soft-bristle brush or an old toothbrush (for accessories only)
• Hot sudsy water in a basin or sink for soaking racks and trays

One rule that cannot be skipped: always unplug your OTG and let it cool completely before cleaning. A hot OTG can cause burns, and cleaning agents do not work well on warm surfaces because grease tends to smear instead of lifting off. Never immerse the unit, cord, or plug in water or any other liquid; this protects against electrical shock.

How Do You Clean an OTG Oven Step by Step?

Cleaning your OTG does not need to happen all at once, but following a proper order makes the process faster and more effective. Start from the inside, work your way to the accessories, and finish with the exterior.

Here are eight simple steps that cover every part of your OTG.

Step 1: Unplug and Cool Down

Always unplug the OTG, switch the Timer Knob to the Off position, and wait at least 30 minutes after your last use. Cleaning a warm oven can cause burns, and grease smears instead of lifting off hot surfaces. Once the OTG is cool to the touch, open the door fully and move on to the next step.

Step 2: Remove All Detachable Parts

Pull out the wire rack, baking tray, crumb tray, and rotisserie rod (if your model has one). Keeping these parts inside while cleaning the interior only makes the job harder. Set them aside in the sink or a large basin, and you will clean them separately in Step 4.

Step 3: Clean the Interior Walls

Glen OTGs come with a Quick-Clean coating on the interior, which makes wall cleaning straightforward. Dampen a soft cloth with warm water and a small amount of mild dish detergent. Wipe the walls, ceiling, and floor of the OTG gently, working in sections. Avoid the heating rods entirely.

Do not use steel wool scouring pads, abrasive cleaners, or any metal utensils to scrape the walls. These will damage the Quick-Clean interior and reduce its effectiveness over time. For stubborn grease spots, leave the damp soapy cloth pressed against the spot for a minute or two to soften the residue, then wipe again with a fresh, damp cloth.

Finish by wiping the inside with a clean, damp cloth to remove any detergent residue, then leave the door open to air-dry.

Step 4: Wash the Racks and Trays

Wash the wire rack, baking tray, and rotisserie spit in hot sudsy water in the sink, or place them in the dishwasher. For heavily greased racks, soak in hot soapy water for 20 to 30 minutes first, then scrub with a non-abrasive sponge or soft-bristle brush.

Avoid steel wool or metal scrubbers, as they scratch the coating. Dry everything completely with a paper or cloth towel before placing it back in the OTG, because wet metal left inside a closed oven can develop rust.

If you regularly make oil-heavy OTG recipes like tandoori chicken, placing a baking sheet under the food while cooking saves a lot of scrubbing later.

Step 5: Clean the Heating Rods (Carefully)

Heating rods are the most delicate part of your OTG. Use only a dry, soft cloth to wipe off visible residue. For stuck-on carbon bits, a soft-bristle brush with very light pressure works, but never press hard enough to bend the rods.

Never pour water on the heating rods, and avoid liquid cleaners or sprays entirely. If dry wiping does not remove heavy buildup, run the OTG empty at about 150°C for 5 to 10 minutes. The heat loosens carbon deposits. Let it cool, then wipe again.

Step 6: Clean the Glass Door

Wipe the inside of the glass door with a soft, damp cloth and a small amount of mild dish detergent. Work in circular motions, then wipe again with a clean, damp cloth to remove any soapy residue. Dry the door with a paper or cloth towel to prevent streaks and water spots.

Clean the outside the same way. Pay extra attention to the door seal area, where crumbs and grease tend to hide. A clean seal prevents heat from escaping, which matters for consistent temperatures during convection baking.

Step 7: Empty and Wash the Crumb Tray

The crumb tray sits at the bottom and catches food debris and grease drips. Neglecting it is the most common cause of smoke and bad odours. Slide the tray out, dump the contents, wash with warm soapy water, and dry completely before sliding it back in. Empty it after every 3 to 4 uses, or right away after heavy grilling sessions.

Step 8: Wipe the Exterior

Wipe the outer body with a damp cloth. Clean around the knobs and control panel gently, avoid letting water drip into openings, and dry with a soft cloth.

How Often Should You Deep Clean Your OTG?

How often you clean depends on what and how frequently you cook. Here is a simple schedule to follow:

• After every use: A quick wipe of the interior walls and crumb tray. Takes under 5 minutes.
• Every 2 to 4 weeks: A full deep clean using a damp cloth and mild detergent for the interior, racks, trays, glass door, and crumb tray.
• Weekly: If you use your OTG daily for heavy, oil-based cooking like grilling or roasting.

Even a quick wipe after cooking paneer tikka or baking a batch of cookies prevents grease from hardening into stubborn stains. The less buildup you allow, the shorter your deep cleaning sessions become.

What Mistakes Should You Avoid While Cleaning Your OTG?

Even simple cleaning can do more harm than good if you rush through it or use the wrong tools. Keep these common mistakes in mind before you start.

• Cleaning while the OTG is still warm. Wait at least 30 minutes after use. Hot surfaces cause burns and make the grease smear instead of lifting off.
• Using abrasive cleaners, steel wool, or metal utensils on the interior. These damage the Quick-Clean coating. Stick with a damp cloth and mild detergent only.
• Scrubbing heating rods with wet cloths. Water on exposed electrical elements can cause short circuits. Always use a dry cloth on the rods.
• Putting wet racks back inside. Moisture trapped inside a closed OTG leads to rust and musty smells. Dry every part completely before reassembling.
• Ignoring the crumb tray for weeks. Old crumbs and grease drips are the top cause of smoke and bad odours during cooking. Empty it after every 3 to 4 uses.
• Immersing the unit, cord, or plug in water. This causes an electrical shock and damages the oven. Always wipe the body with a damp cloth; never submerge it.

What Maintenance Habits Keep Your OTG Running Longer?

Cleaning is only one part of keeping your OTG in good condition. A few simple habits make a real difference over time.

• Season your OTG before the first cook. When you first unbox it, wash the racks and pans in hot sudsy water, dry them fully, and run the OTG empty at maximum temperature for about 15 minutes with both heating elements on (Function 4). This burns off any packing oil left from shipping and gives you a clean start.
• Place a baking sheet under your food. A sheet catches drips before they hit the oven floor, which means less mess and fewer smoke issues during your next cook.
• Avoid overcrowding the oven. When food is packed too tightly, oil and juices splatter onto the walls and heating rods. Leave enough space for air to circulate.
• Dry all parts thoroughly before plugging in. After a deep clean, make sure every surface and accessory is completely dry before reassembling and switching the OTG on. This prevents short circuits and rust.
• Store with the door slightly open. A closed, unused OTG can trap moisture and develop musty smells. Keeping the door ajar helps air circulate.
• Check the door seal regularly. A dirty or worn-out seal lets heat escape, leading to uneven cooking. Wipe it with a damp cloth every time you deep clean.
• Do not ignore smoke or unusual smells. Smoke usually means old grease is burning inside. A chemical smell could point to a heating element issue. Unplug and inspect before using again.
• Keep the exterior dry. Wipe spills on the outer body immediately. Prolonged moisture causes discolouration, especially in humid Indian kitchens.

For a detailed look at OTG features and how to pick the right size, read this complete guide to OTG ovens. And if you are comparing your OTG with a built-in oven, keep in mind that cleaning methods differ between the two.

Give Your OTG a Fresh Start This Weekend

Half an hour every couple of weeks is all your OTG needs for years of reliable baking, grilling, and roasting. Stick with a damp cloth and mild detergent, keep the crumb tray empty, and let the oven air-dry after every deep clean. Your food will taste better, and your OTG will perform the way it did on day one.

Glen offers OTG ovens from 9 to 60 litres, all with removable crumb trays and a 2-year warranty, starting at ₹2,595. 

Find the right fit for your kitchen from the full OTG range.

FAQs