my "new" disc is just a year dirn, and it was created by a really "micro" rockfall a crack from the inside right top side about 8 cm long.
I really have the impression that the discs from the accessories are not as relaxed as the original discs and therefore tear faster?
This means that residual tension is present from the glass production and thus promotes a tearing?
==References== Is even the material thickness slightly lower than then?
Is anyone here familiar with glass?
Really annoying, moreover, I know that if necessary. the window frame can be damaged when disassembly...
Greetings
Marco

ps: ah I have 30 years warranty on the installation