They have been using that demonstator for 7-8 years at least. Now Whether it run dry or even if it was run with water being applied to it, there is no disputing the fact that Lammscloth and even bristle will feel softer than traditional cloth. Lammscloth is far gentler than anything I'v ever used and we've been using it for over 11 years now. Try staying in a car going and go though a car wash equipped with all three materials and you tell me which one sounds gentler to the customer.
Now you can wash with whatever you want wash with, but I have no problem telling people that we use the gentlest material in the industry to wash their car. Let them go somewhere else and then they can be their own judge. There is no doubt that bristle and traditional cloth yeild more vehicle's washed and lower replacement cost than Lammscloth, however it certainly gives one a
marketing advantage that should and can be exploited without going negative against your competitors who cling to traditional materials. Just pointing out to your customer that you've invested in a new material that is far gentler to their "baby" and then letting them be the judge when they go elsewhere is fair game. You may feel its unfair or puts doubt in the minds of customers about automatic car washes in general. However, every industry tries to educate their customers about their competitive advantages - its called
marketing. If you can't take the heat, get out of the kitchen or better yet switch and gain the advantage for yourself.
Its no different than what the cloth manufacturers perpetrated on the public when cloth first came on the scene. No one in their right mind would rather have harsh brushes put on their vehicle when "soft cloth" was available. Even though every operator knew then and still does that bristle is actually softer (when properly lubricated) and does far less vehicle damage than traditional cloth does.