Holographic Sheet  

Holographic Sheet

I bought a holographic sheet from Amazon and have had a few successful prints and many failed prints. I've noticed a couple of things....

Normally, I print on textured sheets. I'd say well over 95% of my printing has been PETG on the textured sheet, a small amount on a satin sheet, and an even smaller amount has been PLA. No matter what material I'm printing, or which of those two sheets I've printed on, I minimize my touching of the TOP surface of the sheet. I'll touch the bottom of the sheet with greasy fingers, just not the top. I've likely gone through more than a hundred rolls of filament in the last few years.

This has worked very well for me. If I ever have adhesion issues, I take it to the sink, wash it in hot water with a bit of spray detergent, scrub with a paper towel, and all my problems are solved. I moved into a house for a year and NEVER washed my print sheet while there. I've successfully gone over a year without washing my textured sheet and had NO adhesion issues.

Now for this stupid holographic sheet. I've had a dozen failed prints and two successful prints on this thing. I think I'm currently printing my third success. All three successes happened immediately after I washed it as described above. Yesterday, after my second successful print, I popped off the parts without touching the sheet at all, and started another print. Filament wouldn't stick.

Is this coincidence? Or is this a "trick" to using holographic sheets?

Also, I've noticed the mesh bed leveling sounds different. The Z axis makes a different sound when the PINDA is performing the mesh leveling. I occasionally hear this different sound when leveling with the prusa sheets in some spots, but it seems like the holographic sheet consistently makes this alternate sound. The sheet is flimsier, so is the PINDA just not reliably able to detect the sheet? If I can't get a good mesh leveling, this can easily explain why I'm having adhesion issues, but it still seems odd that washing the sheet immediately before printing helps.