shower door handles

try JB Weld.

Maybe rear view mirror mounting adhesive?

Not sure how easily they are being knocked off, but if the doors are being slammed back/forth, may be better to reattach handles, than replace the glass.

Jerry

I tried different adhesives, but finally used JB Weld. So far so good.

Do your handles have a small hex head bolt that snugs down through or onto the surface of the glass? If not perhaps seek newer ones that do that as then you have some mechanical force. In addition some double sided tape may help. I had the same issue as you until I got the bolts that snug onto the glass with rubber gasket also installed

I have had great luck bonding different types of materials such as glass and metal together with Goop All Purpose

If you can clamp it for 24 hours it seems to work on anything.