Head on my wedge flew off

I was at the range this weekend and the head on my wedge flew off and needs to be re glued. Guy next to me said using it to get balls out of the water and washing the club is the cause and he was correct. I just had stuck it in the bucket to clean it after chipping and I used it to get a ball out of the water a couple days prior.

Anyway do I need to take it to a golf shop to get re glued? How much does something like this cost?

Thanks