HCA: Hermit Crab Association

For the life of me I can't find suction cups that stay stuck on the glass. I'm thinking about gluing them on permanently to the glass unsing superglue.
Opinions?

Superglue is commonly used in aquaria, which is also fine for crabitats. The only problem is that the high humidity/heat will cause it to loss it bond. So yes, it can be used, but don't expect it to last for long.

Maybe try the corner guard method like a few members here use?

Have you tried adding little water to the cups? It can make them stick again. I would say super glue is fine if it doesn't have a strong smell.

Super is okay to use as long as the crabs are removed from tank or it's done away from the tank. It's completely safe for the hermits to be around once it's dried and there is no smell.