u/Classical_music315

Hey everyone!
I need help regarding rain guards. My CRV driver's side rain guard started to rattle loose when driving and I was wondering if anyone knew of an adhesive I could use to save the old one. Or is this a scenario where I need to just scrap it and get new ones? They've been on the car for 4 years.
If I need to remove them, how do you safely do that to where the paint or chrome won't chip? Maybe a heat gun?

Thanks :)