I use the hell out of my vx5000.. (especially since I tweeked it to 5 bar) it's awesome for crayons melted on leather or plastic or carpet. the "goo" on steering wheels and turn signals melt away.. (just ewww). windows come out flawless.
I used it the other day to get hardened grape gum out of carpet that the owner said was in there for 5 years cause she couldn't get it out. 2 minutes and it was gone.. the funny thing was that you could smell grape as it was working.. MMMMM... 5 year old grape....MMMMMM!
I think the vent steaming while it certainly looks way cool, does not really do much but put humidity in the vents.. think about it.. i can put my hand 8" from the tip of the steamer without it burning.. 2" would jack me up but 8" nothing.. to kill bacteria with steam you have to have contact, temperature and time. when shooting through the vents, all you get is the time.. I'm sure the germs appreciate the humidity blast though.
I'm not saying I never did the vent show, I just don't buy that it works. Just sayin.
How did you tweak it to 5 bar?