I’m having a similar issue, it was printing irregularly with lots of bumps/hairs. I performed a 12h dry cycle and no improvement. Either the default print settings are incorrect or the material is shot, I am trying a double-layer interface on my next print to give it a chance. I received my material new two days ago. There is not really any obvious date or lot code on the box, only a bar code that reads 931042539703, maybe there was a bad batch recently?