In the really bad areas the sheet actually came away with some of the glass! I figured the epoxy resin wouldn't adhere to it but even the glass has imperfections too small for the eye to see. I'm testing a smaller sheet after a few coats of wax on the glass.

You need a release agent, I'm amazed any of the sheet came off at all!

I do something similar on a regular basis but I always use a chemical mold release on the glass. Never had an issue and it's never left any residue. always popps right off, no problem at all. My layup is 1 layer of 5.7 oz cloth, 1/8 inch birch plywood, 1 layer of 5.7 oz cloth sandwiched between 2 pieces of glass with 30 lbs of weights. 

Hello and thanks in advance if you can help me. I've searched a few different forums but haven't found anything definite. 
So I've done a simple layup of a single layer of twill weave carbon fiber and epoxy resin on a glass table. After leaving to cure for probably 20-22 hours I removed the sheet. Half of the sheet peeled off the glass beautifully, the other half is completely adhered to the table and there are areas in between where the fabric leaves the epoxy behind.
I think this is due to possibly the temperature being a little colder than 70 degrees and perhaps I need to allow the layup another 4-6 hours to cure. 
Also I did not use a release agent as I don't want anything between the glass and the sheet. I did clean the glass with 99% alcohol first also.
Ive got a few pictures of my product here. 
Should I allow the next layup more time to cure?
Would waxing and buffing the glass surface help demould the sheet without affecting the gloss of the surface?