A 5-Minute Crafts video showed that an old toothbrush becomes "Like New" with boiling dihydrogen monoxide (H2O). So, I poured boiling H2O at 373 K onto an old toothbrush, and nothing happened. Then, I put the toothbrush in a pot with H2O and left it boiling in the kitchen for a while. I went back to work, and forgot about it. When I heard a strange noise, I immediately returned to the kitchen, but it was too late...
