What if my fabric says "do not pre wash"?

Hi! I bought a few fabric quarters from Joanns and the sticker says "do not pre wash," but it has washing instructions. Do I still pre wash it in this situation?

jessyratfink8 months ago

Honestly, I wouldn't worry about it as long as you plan to put the finished embroidery in a hoop! Just make sure to rinse the embroidery under cold water to ensure no color-runnage. :)

Does this mean one doesn't need to pre wash the fabric if it is supposed to stay in the hoops? do they not need washing ever? what if they get dirty over a period of time?what are the cleaning measures then?