I never have a problem with pasta clumping because I have mastered how to make it. First of all, if you buy a higher quality pasta the chances of clumping are smaller. Second, you boil the water and put a tiny bit of oil, and salt. Remember, you must put the pasta in when the water is really hot already. Main rule, don't overlook it. If you're in doubt if it's ready, grab a sample with a fork and taste it. I like my pasta al dents, if you like it softer check often to make sure it gets soft but not too soft, that is when is clumps.