Cross-contamination occurs when gluten-free foods come into contact with foods that contain gluten. It can happen during the manufacturing process, for example, if the same equipment is used to make a variety of products. Some food labels include a may contain statement if cross-contamination is likely.
After getting a tattoo, swimming must be avoided until the skin has stopped peeling and all scabs have fallen off. For most people, this means waiting a minimum of two weeks.
One of the worst things you can do to a new tattoo is get it wet. Do not shower for at least 24 hours. Don't soak in anything -- a bath, hot tub, lake, pond or pool -- until your tattoo is fully healed. Avoid saunas and steam rooms as well.