PVC door problem

Been leaving the PVC patio doors open obviously in this heat. Twice now they have swelled up and can't get them to close. Been using a spade underneath to wedge them shut but will cause damage if I continue to do this me thinks Patio area is a real sun trap!!
Anyone else having problems with theirs,any tips??

When we came back from holiday last week our front door was sticking and not closing properly, it seems a bit better now but still catches a little when closing it - didnt do anything to it though so can't really help.

Yes! Back patio doors, patio doors from conservatory to kitchen and the front door! All PVC doors.

???Catrin,are they sticking?

Our front door sticking, going to,ring the guy tomorrow. There is a wee bolt or screw can't recall what it is and they have a special tool to adjust it which fixes this problem x

Yep. On the bottom. A week ago they were fine but now they catch on the bottom when you try to shut them and you really have to shove them to get them to shut.