UPVC window draughty - already as tight as can go

[Diybeginner5]

I have some draughty UPVC windows that are already as tight as they can go on the cam.

They are south facing so I think over time the seal has hardened slightly and therefore isnt quite as good as it used to be so they are draughty in the corners. As such i wondered if I could add an additional seal somehow as looking at the window the current seal looks like it was fitted when the frames we made.

Grateful for any advice.

 

[albadiy]

on some windows you can buy new seals and fit them yourself

 

[ronniecabers]

Which corners are you getting the draught ? Hinge side or lock side? By the sounds of it you have seals that you are not able to replace ( with a picture we could confirm that ).