After some advice please. We are having trouble with condensation on the bedroom window, its the only room that seems to get it. We open the windows every day. Its making the paint flake off the window sill and was wondering if it would be better to get a UPVC window sill cover instead of trying to keep repainting it all the time. Has anyone got these? Would you recommend them? I know very little about all these new products so dont know how good they are. Thanks for any help.