10-15-2015, 01:19 PM
I would guess pile distortion and wear. Not every problem can be solved with just a cleaning.
If the carpet is old and has not had regular maintenance that is normal.
The carpet is probably clean but still looks dark because of wear.
I would stay with a heavy mix of DS and Punch in the tank on work like this in the future.
Use Hydrox for protein spots in commercial and light colored residential.
If the carpet is old and has not had regular maintenance that is normal.
The carpet is probably clean but still looks dark because of wear.
I would stay with a heavy mix of DS and Punch in the tank on work like this in the future.
Use Hydrox for protein spots in commercial and light colored residential.