Right, certain substances in creams, lotions, makeup products, etc., can and have led to a metabolizing process taking place n in the body in a way that produces a banned substance. In the majority of such cases, athletes in question were not intentionally ingesting banned substances. When they used the products in question, there was no clear evidence available to the affected athletes that a substance in the products might metabolize into a banned drug.Well the cream story has happened before, whereas drank after grandpa (during a pandemic) and ingested enough of his meds to flag a drug test comes off as much more of stretch, but its negligence on both athlete's part
Meanwhile, the grandfather heart medicine contamination story is more than just a bit of a stretch!