Trixie Protective Fencing for Tilting Windows - White

Since I'm not allowed to drill into the frames of my PVC windows, I tried sticking the protective grilles on; so far, only one has stayed in place for about 15 days, while all the others end up falling off after a while, despite trying different types of double-sided adhesive tapes.

The grilles are quite alright, a really good invention if you have cats. What bothers me, though, is that even though the description says you can stick the grille on, it doesn’t actually work, not even with the tape mentioned in the product description. It just doesn’t hold – the grilles gradually fell off, and some couldn’t be stuck on at all because the little metal plates where you’re supposed to put the tape aren’t welded on straight, so you can’t really stick it properly to a flat surface. So even though I didn’t want to drill into the windows, now I have to. Considering all that, I think the price is too high.