My main attendant Jose that fixes "everything" left at his normal time on Saturday and was relieved by my other attendant that cant fix "anything" and as usual after Jose left all hell breaks loose. The SS Pre Soak pump exploded shooting soap all over the room and kept running for 30 min before I could talk him threw shutting down the breaker. So we could get back up and running we labeled the SS pre soak selection with a out of order label. One hour later a customer that looked like a 60 year old "Mr Clean" pulled into the self serve and proceeded to hang his mats up and spray his wheels with his own wheel cleaner(probably a Mr Clean product), after he put in about 3 dollars in quarters(thats the amount it looked like on the cameras?) he then realized there was no presoak and he went completely ballistic! Yelling at my attendant, hands going up and down it was completely uncalled for. My attendant was so shook up he refunded him $10 because Mr Clean couldn't remember how much money he put in! He took the money and left after he washed his wheels of the cleaner he sprayed on. Needles to say I was really upset at my attendant for giving him the $10. We had a talk on how we would handle this next time.