Grannynannywanny
Oldnproud I’ve had a look at my Tower Air fryer. Its the manual model number T17021. The base in mine appears flat. But if I run my fingers across it I can feel the outline of something in the central area. I wouldn’t be aware of that without touching it. To my eye it looks flat. I hope that makes sense!
Yes, that makes sense. That's what I think mine was like, but I'm not abslutely sure.
After using it tonight, and after it had cooled, I rinsed it out and then left some water in it. It was after that that I noticed this quite prominent bulge!