i've been washing this lot here in tennessee now for about six months, just started before that. i'm getting 3.00 a car, which is average around here, dealer supplies chemicals. i hand wash, chamois, and black tires. looking for tiips from people experience on how too speed up the work.right now i do about 10 units per hour but when it come time to black tires i feel like i'm gonna die. has anyone ever done the tire thing or have any tips or maybe know of a sprayer or something similar that mght speed up this process and make it less back breaking. thanks guys