Maybe it is.
Everything changes though. I think longer between cleans will be the norm with better equipment and processes.
We have had and are enjoying a boom in the industry currently that will slow down at some point with all the new cleaners and companies that have started. This will have the affect of driving prices down as the customer will have far more choice, until the market settles again.
I dont think we should worry about it though, we should just be-aware and react where we can.
Lee