Ok, so my resent tattoo needs to be touched up because I broke out really bad with a rash all around the tattoo, I called my tattooist and he advise me to stop using the a&d ointment and to wash off what ever was on the tattoo and let it dry out for a few days and start using non scented lotion, when I went to see him to make an appointment for the touch up, he told me there will be no charge and it will take about an hour or two, I know time is money for him and he rents his space or at least I think he does, anyway should I at least tip him for the touch up? Keep in mind that I did tip him really well when he did the tattoo the first time around and he will be doing my next ttattoo on my left side and that will take at least three sessions to compleat. If I do tip him again, how much should I tip him for his time? Your advice will be greatly appreciated on this matter.