The back glass of the watch fell off, how do I repair it?

Galaxy Watch Active 2 back randomly fell off (they yellow gunk is the glue from the factory). What do I do?

This problem seems to be frequent.

I bought a kit from amazon which was nearly impossible to install correctly (little adhesive and a new cover). I was running and was a little sweaty and the new one fell off again...

Someone said to get 3M VHB tape, but I would love your opinion on the matter...

Maybe superglue to that little trench?

I would still like the HR monitor to work , but as long as I am ensured that no water damage can happen and the back won't fall off again... I'll do it.

anyhow the watch still functions with or without the back but obviously dirt and stuff can get into the sensors