Avoid liquid chlorine bleach, fabric softener, dryer sheets, and washer or dryer balls. Harsh detergents can do damage to fine linens and particularly high-quality sheets. Bleach can weaken the rayon fibers, reducing the life of your sheets, and fabric softener and dryer sheets can leave a film on the fabric, reducing the moisture-wicking properties. Dryer sheets can cause discoloration, and washer and dryer balls, similar to washing with towels, can cause pilling.