Photopolymers can be sticky due to the products used to make it and does have benefits. Use a diazo emulison if you don't want any stickiness at all. Baby powder solves the day and gets you a fast exposing emulsion. We build our emulsions to be durable and have the highest resolution possible. Sometimes that tack is important. The surface tension of direct to screen imaging is better, the dots hold their shape. Or if you are doing a 65 line with real film, the dots will be intimately pressed to the emulsion to avoid halation, especially in 10% and below. Your inkjet printer to film rarely makes a good dot below 5%, thats why it is hard to image and why pure film has such perfect halftone shapes. So Pure Photopolymers have less pinholing, less breakdown when shot well, and have tack that aides some printers and yes it will destroy an inkjet positive in hot humid conditions. Keep your room at 70-75 degress and 35-50% humidity for the least amount of tack.
However, baby powder is such an easy fix for inkjet film users and photopolymers that you ought to try it! No pinholes created, film peels off easily, screens shoot fast, and better edge quality.
Al