A few things I might consider/think to try:

• How old is the PLA you're using? Is it possible it's absorbed too much moisture?
• Are you printing too fast or possibly under-extruding?
• Skip the glue. I've found it's just gunk that separates the filament from the print bed, worsening adhesion in my testing. Clean your print bed with rubbing alcohol before hand.
• How old is your nozzle? If you've been printing for a few hundreds of hours, the inner diameter of the nozzle might be worn out.
• How hot is your print bed? For PLA, I'll usually keep mine around 60°C.

I don't have a Bambu, but these are a few of the things I've learned with my Monoprice Maker Select v2 and Ankermake M5.