Are you sure you aren't printing on the wrong side without the receptive layer?
I got a box of Pictorico recently and found they notched the identifying corner on the wrong side. Ink would pool and not dry. The wet sticky finger test led me to question the other side as the receptive layer, and it was. I wrote to Mitsubishi (Pictorico) and never heard a word as to why it was notched wrong based on the lot number I got. Factory screw-up.