MakerFarm Pegasus 1/4" Plate Glass Bed Corners

I originally was using 1/4 inch plate glass for my MakerFarm 8" Pegasus Heated Bed, and after a year of use the glass plate began to chip off the face when removing prints. I bought a Borosilicate 1/8" glass plate and within a month it did the same thing. My bed temp runs 110*C to 90*C I've switched back to 1/4" plate as I have lots of that scrap on hand. I had been using some crudely fashioned aluminum clips and now have replaced them with these.