A Reddit post on the popular r/CleaningTips subreddit has left the internet trying to solve a homeowner’s bizarre “mysterious yellow stain” problem. The poster said bright yellow marks had started appearing around the house, seemingly without any obvious explanation.
What started as a single smudge eventually turned into a much bigger mystery. The yellow marks reportedly showed up on carpets, a cleaning towel, a foam shoe, a toothbrush charger, the bathroom sink and even a bathroom cabinet. The post quickly drew more than 7,000 upvotes as Reddit users tried to figure out what could possibly be leaving the same strange stain on so many different surfaces.
