Stick with MR-97, which is
Stick with MR-97, which is made specifically for glass.
The first BN spray I bought was Hi-Temp 1800. It left a haze on the glass, and I had some glass stick to a stainless drop mold. My opinion is you will have much better success with MR-97. I tossed the can of HT1800 and exclusively use MR-97. I no longer have problems with sticking/hazing.
Jester’s Baubles Fused Glass Designs