As a followup to my previous tip, I was asked how I get my prints to stick to my build platform. My MakerBot Replicator 2X has a heated aluminum build platform that is coated in Kapton tape. ABS will still okay to this material, but it is not perfect. To help my prints stick better, I was the build platform with acetone before each print. I make sure I do this just before I start the job. Using a paper towel, I ensure there is nothing left on the platform. This also leaves a thin coating of acetone. Hitting print just after I finishing cleaning (but with a preheated bed and extruders), the first layer of HIPS or ABS sticks well. Since many of my prints are for complex parts, there is almost always a HIPS raft. Acetone is a solvent for both ABS and HIPS, making the first layer extra sticky.
I tend to use a fair bit of acetone with this process. I typically get my acetone from Walmart. Acetone is commonly used in nail polish remover and they typically sell large bottles.
If you’re having issues with prints sticking to the print bed, give this a try.