Is anybody using the PEI magnetic build plates? I was all in for a while, I have them on both of my printers now. But now it seems like the honeymoon is over. My prints let go sometimes. I am trying slower first layer speed, hotter bed, and a slightly larger z gap on the first layer. Anyone else? Any tips? I am printing with ABS, PLA, and PETG. I used to think that if I can get the first layer to go down then the rest of the print will be fine. Not the case any more. TIA