The majority of people buy UPVC windows, slide them shut, and never think about them again. They're built to be easy. But "easy" isn't the same as "ignore forever". A bit of dirt in the tracks, a seal that's gone hard, a hinge nobody oiled in five years... small things like this are what turn a 30-year window into a 10-year headache.
The fix is barely any effort. Ten minutes here and...
