I had a similar problem after a few weeks of printing, I had issues with the first layer adhesion. In my case the nozzle was too close to the hotbed even with first letter probing. I tried bed tramming and that didn’t help. Finally I checked the heating assembly. There are 4 screws in the back of the fake stone holding the nozzle clamp. There was a bambulab resource that said you could try to tighten those screws. In my case, these screws were missing completely. New screws did the trick for me.
The problem does not seem to exist anymore. I have printed now two of the 3x4 Grid bins, whereas before evening doing the 2x2 was beginning to fail (usually by the 4th grid it would fail). Problem became most apparent when doing spice trays which had a web on first layer for support.
I did wash the plate, repeatedly. Warm water + dish soap. Waited for it to dry, never touched with fingers, etc… That I am certain was not the cause.
I did check the plate was selected in Studio as that is right under selection for my printer which definitely was needed to select the correct plate size.
One thing I did do is the filament calibration as Rmedias suggested. After the calibration I insured the exact filament brand was the one selected on my AMS and not ‘Generic PLA’ as I had done with the Inland brand. How much the filament profile matters I do not know, but it does seem to play a part. Obviously if I select PETG and used PLA that would be an issue. But could it be having ‘Generic PLA’ was the cause?
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I have 2 X1 carbons and run the PEI plate. Got away with just washing for a ling time then stated to develop the same issues. Now i clean weekly or if there is an issue with a lifting edge. Between prints i spray a light mist ( 3 passes from 12-14” away from plate) of “Rave” ultrahold hairspray. Slap the plate back in and run. Pla, PA6 cf, paht cf, petg, petg cf. all run the same and no more lifting, no inconsistent glue stick coverage etc. parts bond together fine with CA with nice clean joints. My printers are up 98% of the time with gaps for maintenance. Hope that helps.
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Try setting the bed temperature to 65. That will stick better. Depending on the brand of filament you pick from the list, the default bed temperature can change. I had the same problem today when I picked a different brand, the bed temp was set lower.
I am happy that the problem doesn’t exist anymore, but I hate it when I don’t know how it was fixed, because I have to wait to see if it will bite me again 
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Do you calibrate your printer before each print?, what temperature of the plate?, what is your first layer height? Are you using the same setting for PLA+ as you do for generic PLA?
I am thinking that I may now understand more and understand what my problem was…which leads me to this
What is my first layer height? Answer to that is a whatever is default or whatever is there…meaning I do not know enough about changing advanced settings. I am learning there are more specifics which people need to do in this regard.
But I think the real answer came down to your question. Same settings for PLA+ vs Generic PLA?
When I got this printer from Microcenter I purchased 4x PLA filaments based on color. What I ended up actually getting was 2x Inland brand PLA Pro and 2x Inland brand PLA +. In Bambu studio they do not have a profile for Inland obviously, so I had just selected these as generic PLA. This worked, I had no problems with the Inland + or Pro using Generic PLA.
Problem began when I ran out of the Inland and bought Polymaker. These did have profiles, but I just kept using the Generic PLA. When I took the suggestion to do a filament calibration, that is also when I set the profiles after to use PolyLite & PolyTerra for the 2x colors. After that I ended using up both spools without issues, doing countless prints that started out fine, ended fine. My take away is the selection of a profile is actually more important and not something to gloss over (as I had done). Maybe I got lucky selecting Generic PLA for the Inland brand, but when switching to Polymaker brand my luck ran out.
Make sure to use the polylite print profile for the polymakers pla, if you don’t see it, add it, PLA and PLA+ are two different thing and require different setting, and make sure to learn about plate temperature, it explains why the prints kept failing, you are trying to figure out a problem that is not even there, there are only three things you should know for now, First layer height, bed temperature, nozzle temperature, since your printer is not enclosed the temperature of the bed and temperature of the room matter, a long with the speed of the fans
Also some I recommend filament, Elegoo Matte PLA, easy to work with, Elegoo Rapid PETG, they are easy to work and most of all cheo if that’s what you’re looking for
For PLA and PETG I “always” use 65 bed temp on my A1 and A1 Mini, and after > 1000 prints between the two I’ve never had an adhesion issue. I use the textured plate and wash it with warm water and dawn dish soap about every other print run. I primarily use Overture PLA+ (using the Overture PLA setting) and PETG, but I’ve also used Sunlu and Polymaker matte black using the generic PLA setting. So far so good. knock on wood
I also have never had to perform a filament calibration.
First thing is tighten the 3 screws behind the nozzle… on the A1 these can get loose and cause all sort of strange effects!!!
Could someone help me.with my printer. I have notice something below the heatbed. I dont know if it is noemal or if filament ball went there
Post image please, it would be helpfull
I use 99.9% now, but I’ve never had an issue even when I used lower percent for years so I think that could be a rare issue in my experience.
I. reied to.send image and shows an error
Do you use a textured pei plate
Trust me im no expert, however i had a similar issue (well noy quit to that extent but close enough). Any way i did as you did and washed. Then i did aply the glue but i also turned up my bed temp to 70. 8 days later 0 issues. But i still dont really know what the smoking gun was.
I noticed a similar problem with my a1 mini. I am using the same filament as always, same settings, the only thing i changed was adding the ams lite so i could print additional colors. Could the ams lite have changed some setting i am unaware of?
@user_2718254375 Have you tried washing your build plate with dish soap and hot water
Can you share some pictures.
@JonRaymond This should be a different topic
Yes, Ive tried washing and scrubbing the textured build plate with the dawn powerwash spray soap being careful not to handle the surface with my bare hands. I let it dry completely before retrying the print. Same problem occurred. Most of the time the error begins when the printer starts the wiping tower. The nozzle seems to just drag the filament around. Unfortunately i didn’t think to take pictures of the failure before removing it from the plate. Last night i printed a benchy directly from the a1 mini just to see what would happen. It printed perfectly leading me to believe its not a build plate problem.
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