Foil, Paper or Liners: What’s Actually Safe in an Air Fryer?

You want to save yourself scrubbing the basket, so you reach for a sheet of foil or a paper liner. Then you remember a post somewhere saying it’s a fire risk. Is it?

The short answer: foil, parchment and silicone liners are all fine in most air fryers, as long as you follow one rule and check your manual.

The one rule: never block the airflow

An air fryer works by blasting hot air around the food from above and through the holes in the basket. Anything that covers the whole base or flaps loose stops that, so food cooks unevenly and the fan works harder. Loose paper or foil can also be lifted by the fan into the heating element, which is where the fire stories come from.

Option by option

Option	Safe?	How to use it
Perforated parchment	Yes	Only with food on top to hold it down
Plain parchment	With care	Cut smaller than the base so air can pass round it
Foil	With care	Small pieces, weighed down, never covering the whole basket
Reusable silicone liners	Yes	Choose perforated ones in the right size
Aerosol cooking spray	Avoid	Builds up on the coating; use a refillable mister instead

Three mistakes that cause problems

• Preheating with an empty liner inside. With nothing on top, it lifts straight into the element. Add the liner and the food together.
• Foil with acidic food. Tomatoes, citrus and vinegary marinades can react with aluminium and pit the foil. Use parchment or a silicone liner for those.
• Covering the whole basket. Leave a gap round the edge so air can move.

Baking paper or greaseproof?

In UK shops these are often sold side by side and they’re not the same. Baking paper, sometimes called parchment, has a silicone coating that handles high heat and releases food cleanly. Greaseproof paper is designed to resist fat, not heat, and can stick or scorch. For an air fryer, buy baking paper or ready-made perforated liners.

Cleaning the basket when you don’t use a liner

1. Let the basket cool, then soak it in hot soapy water for ten minutes.
2. Clean it with a soft sponge or brush. Avoid scourers, which scratch the coating.
3. For baked-on grease, a paste of bicarbonate of soda and water left for a few minutes usually lifts it.
4. Dry it fully before putting it back, and wipe the inside of the drawer while you’re there.

Check your manual before using the dishwasher. Many baskets are labelled dishwasher-safe, but hand-washing tends to keep the coating going longer.

Why sprays are the bigger issue

Aerosol cooking sprays contain propellants and additives that bake onto non-stick coatings and leave a sticky film, the same problem we cover in why your non-stick pan stopped being non-stick. A refillable oil mister gives you the same light coating with nothing else in it.

What we’d use