Ah ok, I was never taught to patch test either, the way I look at it is, if a client has severe eczema or sensitive skin, allergies etc, this would be covered in the consultation, besides these clients would not be unlikely to book a tan in the first place. Also the majority of my clients that book for a spray tan have used fake tan themselves at home. Finally spray tans are water based anyway so there's not much to be allergic too if that makes sense! X