Stains on alluminium bed

[Melka 57]

Hi!

I have my Ultimaker 2+ for 3 weeks and enjoy it very much so far.

I recently identified some stains on the aluminium bed, just below the glass.

I tried to wash both the glass and the aluminium bed but it didn't do much.

It seems that the glass facing the aluminium got a little bit deteriorated at this specific spot (rough to the touch).

Should I be concerned ?

Thanks!

[Dim3nsioneer 558]

It might reduce temperature locally a bit and you might get adhesion issues. I would try to sand it with some very smooth sanding paper. Be carefull not to bend the heater PCB.