You really need to get the grit out of your carpets!

I can honestly say I have never cleaned a carpet and not found a significant amount of grit left in the recovery tank of my machine. The amount varies but not its presence. It is this grit that grinds the life out of your carpets. Regular deep extraction cleaning extends the life of your carpets, because this grit is removed by this process. Lifting the grit out from deep down in your carpets pile reduces the grinding effect of the grit as you walk across your carpet. It’s like rubbing sand paper deep down in your pile. This causes the pile to weaken and even be lost up your vacuum cleaner and its worst where you walk the most. Regular deep extraction cleaning of your carpets protects them.