Commercial carpet loves getting cleaned up with a truckmount.
I’m assuming you’re new.
So let’s get a couple things checked to be certain your machine is tuned properly.
-Check the gaskets around your recovery tank lid for complete suction
-is your mercury hg set at 14-15 on the vacuum gauge?
-are all your filters (blower, filter on solution hose, inline orifice, basket, water box screen filter, any more) clean?
-what kind of wand are you using? New or old?