The only problem I've had with area rugs is the ones that bleed color dyes. I use OSR for urine stuff. I use low PH
cleaners for the bleeders with low heat or no heat. Also , FAST dry the bleeding ones!
Nice money for working in my own house, I do not like to do area rugs in custys house.
I use HWE, and clean them on a tarp , I like the tarp because i can overhang the wand about 3'' over the edge of rug.
The tarp sucks up to the wand on the over hang, while the rest of the wand stays cleaning. I get nice results on the edges
and never have to hook up a smaller tool.
1- inspect rug(s)
2-hang and beat loose dirt out
3-vac. both sides
4-clean with necessary chems and systems
5-speed dry
hope this helps, I've only had to bath 2 rugs so far because the urine contamination was unreal!