Diagnosis
You're almost certainly using an abrasive—metal utensils, steel wool, scouring pads, or even some harsh dishwasher detergents. The coating is delicate.
How to Fix It
Stop the damage now. Hand-wash only with a soft sponge or cloth and mild dish soap. For stuck-on grease, soak the basket in hot, soapy water for 20 minutes, then gently wipe. Never use metal utensils inside; use silicone, wood, or nylon.
If That Didn't Work
If the peeling is extensive and flakes are getting on your food, the basket is a safety hazard and needs replacement. Contact KMFurnila for a replacement basket. Do not try to re-coat it yourself.
Heads Up
Even small flakes of non-stick coating are not safe to ingest. If you see any peeling, inspect food carefully before eating. A fully peeled basket will also cause severe sticking and smoke.