Difficult to recognize. The upper part looks good. I would probably check if you have duplicate or useless vertices. Mark everything in vertex mode and with key M -> Merge by Distance. A small window will appear at the bottom left where you can set the distance.
You could also check the normals of the faces. Select Face Orientation and if any are red, flip or recalculate with ALT + N.
Hi Mischa MMischa ,
It looks like it's Scaling outwards and inwards at the same time...I agree with Leo, it's probably double Vertices or inconsistent Normals, possibly both.
I think I will just crate new cylinder.
Tnx all for your help.
Yay after creating new cylinder all worked.
Tnx everyone
