Hi. I had to clean the front element because inside it had a little spot with fungus, mold I don't know (looked like the thing you see in spoiled food)).
So I had to unscrew the front element. The screws (the two holes actually) are covered by a circular plastic material which I had to remove. After cleaning and screwing back the front element, now I need to stick this circular plastic thing back. But it doesnt stick anymore. It had (I don't know how they're called in english) biadhesive (which sticks from both sides) I took the biadhesive off of the plastic-screw-covering-circular thing and now I need to attach it back.
Maybe they sell these things already with biadhesive in them on ebay, but I don't know how they are called.
Or if someone has another solution to stick this circular plastic back (maybe with some other type of glue).
Thank you all for the eventual help