Yes, you can blast it with TB cleaner. However the way it is made, it probably will do little good. It is bit like a maze. I noticed no difference before or after cleaning. However after cracking the gasket, the idle was much faster and erratic. A bit of backing from a notepad, an Xacto-knife and some Indian Head gasket cement, all appears to be well.
I used cleaner on everything except the sensor connectors (pin areas) to prevent potentially damaging them. I also rinsed the o-ring for the IAC in tap water to make sure it was completely clean before re-using it since it was in good shape and i didn't have a replacement. Otherwise, I'd say always replace o-rings as a best practice.
1993 YJ 4.0L
1999 XJ 4.0L (Going up for sale very soon)
2007 XK 5.7L