My biggest opinion on this subject is to never let your sheets sit unlaundered for more than 3 days. I try to wash my linens within 24 hours of use. This has allowed me to have sheets for 3 or 4 years!Also, I have both white and colored sheets. I can hold on to the colored ones longer, because of the hidden stains. I know that alot of therapists find colored sheets to be unprofessional...or its not consistent with their color therapy...or its a fung shui thing...but all my sheets match, with different shades of purple, maroon, navy, and hunter green. I usually use a dark sheet on the bottom and a white sheet to drape the client. When I'm bringing in a new client, I tell them to disrobe, lay down on the table and cover themselves with the WHITE sheet. You'd be suprised how often people would get under both, lay on top of both, take my hand towel from the counter to cover up, lay upside down with the feet on the face cradle...it's so funny how people will look right at me when I'm telling them how to lay down, then I come into the room and they've got it ALL WRONG! It's really amusing sometimes.P.S. what's wrong with bleach? I use bleach on my whites, but I know some don't like to use bleach. I don't know why. I also hang my white sheets to dry instead of putting them in the dryer every time. I have burned brown spots into whites by drying them. My dryer doesn't have a heat setting.