I cleaned my afe this last weekend. I parked the truck for the night and pulled the filter at about 6pm. Spraying and rinsing the filter in the kitchen sink took about 20 minutes. It was a fairly dry day with about 35% relative humidity. I let the filter sit in the kitchen on some newspaper. The next morning at about 6am the filter seemed dry so I sprayed it with the oil. After the 20 minute wait I checked the filter and found a few white spots so I touched up the spot with more oil. By 7am I had my truck ready to roll. I was surprized to find that I still had about 2/3 of the oil and cleaning fluid left so I guess I will get three clean ups out of one kit.