We have a sliding glass door in our house that we use frequently to let our dogs into the back yard. I didn't know it was there until this summer (long story), so this is our first winter using it. I live in the Chicago area, so it's been cold the last few weeks. We also keep that room colder than the rest of the house. As a result, the sliding glass door has been freezing shut almost every day.
I'll hit it with a hairdryer to melt the ice and then dry it off the best I can, or spray the track with WD-40 (or both). This will work short term, but it will usually freeze again within a day. If I hit it with WD-40 literally every time I open or close the door (usually about 8 times a day), it'll usually be fine, but a) this uses a shitload of WD-40, and b) yesterday we realized that our dogs like to roll around on the track and managed to get WD-40 all over their coats, which is presumably bad for them and a pain to clean off.
Am I missing another option that would make this simpler? The obvious answer would be to keep that room warmer, but we'd rather not do that. Thanks.