Quoted from Mamushka:

Would have thought you would have mentioned that earlier on in the post, if you were somewhat concerned (or even remotely questioned) about the possible lead contamination that you tested your dishwasher. I'm sure you thought others may have had the same thought? Glad your swipes came up clean, but I still doubt you will find someone in the poison control industry who would be OK with putting lead (not contained in a glaze) in a dishwasher. Not trying to sink your process here, just think people should know of the potential risk that they might not have thought about.