What is the best way to clean a glass bowl/pipe?

I’ve made good use of my three glass pipes, and I’m trying to clean them. I’ve always been told that the best way to go about this is a good soaking in white vinegar followed by a rinse in hot water (and obviously being left to dry afterward). I’ve done this, but one of my pipes just isn’t as clean as I’d like it to be. Does anyone else know any tricks for cleaning residue from tobacco and resin out of a bowl, both the part that actually has the resin and the interior smoke chambers?