Recently my plastic window has started creasing vertically so i have to get out and give it a "boxster chop" so that it doesn't get pinched the wrong way and potentially split.

I have always previously just been able to lower it normally before. ..really annoying in slow traffic when the sun comes out after the rain.

any ideas why this might have started?

cheers

simon

 

You want to treat it before it becomes a crack.

BMW cream cleaner (see faq) is good for a) keeping the screen clear and b) keeping it supple and soft.

Only lower the roof when "warm" too.

 

Check your elastic straps too Si.

 

mine did this... then cracked when i tried to help it straight... arse... now i look like a pikey with tape over the window !

 

ahh - i thought the elastic straps might have something to do with it.. is this the symptom of the elastic weakening?

I think i might try using bull dog clips or something to take the slack out and put extra tension in them to see if it helps.. then it's elastic replacement time - whoopee

 

My roof started to do this and then the back window cracked, So i've ordered my new one just waiting for it come