I would say...everything that amma said but I would also add from my exp. speed up the machine a little, and slow down your movement.
I use a pair of gloves I got last year during winter time for 1.00 they have the little rubber nubbies on them and they grip the fabric. This is what I do when my fabric starts to "stick" to the bed of my machine. I get a paper towel and spray a little bit of PLEDGE multi surfice on it, just a tiny squirt. Then whipe it clean making sure to leave none of the liquid behind, this seams to give my machine that little bit of slickiness it needs so I can move the plastic around without having any trouble!
good luck and keep practicing!