Found a mysterious yellow powder under my mattress

I was doing some spring cleaning and decided to tackle my mattress. Big mistake? Maybe! After pulling off the sheets, I discovered a layer of strange yellow powder underneath. It wasn't there the last time I cleaned, and I'm totally freaked out! Anyone know what this could be? Is my mattress haunted by Cheeto dust? Seriously though, a little concerned. #MattressMystery #YellowPowderPanic #CleaningHelp

(P.S. My mattress is made from coconut palm, if that helps! Also, any tips on how to clean up this powdery mess would be much appreciated!) #matressproblem #needadvice #needhelp #AskLemon8