For ABS I'm almost always doing slurry. I do wipe the glass with Aquanet on a towel as a "cleaner". Some swear by just Aquanet, it just never works for me, especially on big prints. If you go the Aquanet route you gotta get it on there thick. Like 3-4 heavy coats and let each coat dry before the next one goes on. There are Youtube videos on this.