I cover the glass plate with Kapton tape.Then dip a rag into acetone and wipe it on an old failed ABS fragment to bring a little ABS onto the rag. The Kapton surface is wiped with that and it puts a fine ABS film onto the Kapton (but make sure you do it cold). It sticks like s**t to a blanket when hot and releases reasonably well when cold. The bed is heated to 110C before printing at 250C.
ABS is tricky! I'm guessing you have a UM2 or a UMO with heated bed?
What are the parameters you're using? (temperature mainly).
Make sur your first layer is well "pressed", it's the first thing to check with poor adhesion. You might need to level the bed a bit closer to the head.
Pictures help too
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