Build plate premature failure

I have three PEI build plates that I cycle through (I hate waiting for cooling). Two are starting to give quite a few “Build plate not placed properly” errors. However if I look at the (well placed) plate, it seems that this is triggered by the printer homing to the “cleaning area” and then finding a warn spot. The same spot, always the same tiny spot. There is a long area it could be testing, but it seems to be intent on wearing the coating off one tiny spot and then rejecting the plate.

Is there any way to adjust some setting so it would pick another spot a little to the left or right? Perhaps the algorithm should pick a random spot with the available area? I would hate to have to keep buying new plates because only one tiny spot is warn out when the rest of the plate looks brand new.

Alternatively, can I “paint” the spot with anything? Something cheaper than a new plate.

You could edit the machine start gcode, using chatgpt to help you, it’s labelled under ; build plate detect

However, you might as well just disable build plate detection in printer settings since the chance of not putting your build plate is probably low.

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If the issues is a tiny worn spot and nothing else…
Clean the spot properly, then fill it with baking soda.
Carefully and preferably using a very fine tip add a tiny amount of superglue on top - just enough to wet the powder.
Will set instantly and rock hard.
In case you end up with slight dome you can scrape the excess off with a hobby knife or other hard metal tool - just be careful not to scratch the plate.

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