I am curious. On my textured plate I find that I need to use glue now.
I have a filament drier, I use desiccant, I wash the plate in soapy water and a bristle brush but still have issues with some prints so tend to use glue on all longer prints now.
I am wondering what the problem might be? Could it be the type of dishwashing liquid I’m using?
The plate is only 4 month old.
Snap… I will look for something not so gentle to wash my plates with…
Thanks
That is indeed not normal. When I had that in the past, I could (almost) always get adhesion again with repeated and very firm scrubbing.
On that one occasion where that still didn’t help, I thought about replacing the plate but was able to get it working again using some steel wool during cleaning. It can damage the coating but since I was about to chuck the plate, it was a worthwhile last ditch effort.
The type of dishwashing liquid could of course also be an issue. But I would expect issues to arise pretty quickly and suddenly after cleaning as the wrong type of liquid (scented and or oiled) would lead to a widespread, thin contaminant film.
Dawn or Palmolive are usually reported to be pretty good while I myself use a no-name brand.
It is also worth to double check your workflow and consider the materials printed. When using both PLA and PETG for example, cleaning is needed more frequently and more thoroughly than only single material plates.
For others, simply cleaning and trying to print on the other side has been useful. Due to my workflow however, I do not use gloves when handling the plate, I always leave fingerprints on the rear.
Finally, I keep my plate cleaning utensils (microfibre cloth, nail brush) in a dedicated place. There’s no telling what they are used for by other members of the household when I forget and leave them by the sink 
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Addendum: It is also worth noting that in particular the build plate should not come into direct contact with silica (beads, liquid). Either directly or dust transfered accidentally by hand. Silica is a very common cause of all kinds of adhesive failures, not only in FDM. Fortunately, the dust tends to wash away easily from the plate if not “baked in”.
I purchased some Fairy. It looked like the best option at the shop I went to.
I will also get some dedicated cloths as I use just the kitchen towels. I will also wash them on their own rather than with the regular laundry detergent I’ll give them a rinse wash.
The plate still works, it’s just not a good as what it was.
I do use a lot of PETG and ABS so I will make sure I wash after every use which I typically do but sometimes I forget.
I also think I need to learn how to adjust the things like bed temp and any other settings to work better in my environment. Sub tropical, high humidity, now going into the cooler dry season (thank goodness).
There is so much to a 3D print quality and although I loved the Bambu Handy app it was not until I installed Studio that I really started to understand the huge range of options to improve what you make.
I also installed Blender…. now that is another subject all together… lol
Thankyou for your detailed reply. 
I think Fairy should work well. At least, I do remember having used it in the past. Do not forget a stiff brush. I use a dedicated nail brush but a dedicated diswashing brush works just as well. I have found it important to get down into the valleys of the textured plate and scrub the grime out.
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I at least use a stiff brush… 
lol
I ran into this issue as well. It started up after I switched from Bambu Lab Filament to an off brand. I struggled to a couple of rounds of “spaghetti”, then switched back to Bambu filament and had no issues. After glue and researching it I found a few things.