my 07 plate doblo taxi has a rear sliding window which isnt opening,having read the old threads on this problem i did what they say and used silicon on all the runners and still it wont budge,the top seems as tho it wants to move but it is the bottom runner which seems to be stuck.anyone else got any ideas or do i just keep doing it till it finally comes ok,thanks choc

I noticed on mine that if they are not opened for a while, the catches sieze up. even though you press the button/lever, it doesn't fully disengage & so the glass won't move.

If youre talking about the side sliding door windows, you are squeezing the catch yes?

I gave the window/runners/catch a good going over again with silicon and when i tried it the next day it opened no problem,will have to open them more in future to stop them sticking again.thanks for your help