yeah I tried pei tape for a short while - wasn't impressed.

I can recommend printbite. After 18 months of trying everything else I've been using printbite for over a year now, with no problems.

What printer do you have ? And what are the conditions of the room it's in ? temp and humidity primarily.
Enviromental conditions can have a disproportionate effect.

My biggest issue with blue tape is that it can pull off (although if you apply it to a hot bed, it's better) and you often get blue marks on the base of the prints.

Printbite isn't miraculous, but it's better by a long way than anything else I've tested in the last 3 years.