Add Yahoo as a preferred source to see more of our stories on Google. Credit: Getty Images One minute you're enjoying a burger and fries; the next, a bright red ketchup stain is staring back at you ...

The yellow won’t scrub out. You’ve emptied half a bottle of bleach into the bowl, let it sit, flushed, and the stain is still there, maybe a shade lighter, back to full strength within the week.