Always follow the instructions that accompany the products you buy.
Cotton requires water. It is preferable to wash cottons (unless otherwise indicated on the label) instead of having them dry-cleaned.
For cotton sheets and duvet covers as well as towels:
Wash in cold, lukewarm or hot water (for whites) with your usual laundry soap (without bleach). Use “oxyclean” products with your soap as a separator. For tougher stains, soak the fabric in lukewarm or hot water with this product until the stain disappears. Always follow the instructions indicated on all these products. Very hot water can help preserve the beauty of white sheets. For cottons with saturated or dark colours, add salt (1 tsp.) or white vinegar (1/4 to 1/2 cup) with the soap to the first wash (cold water) to fix the colour.
Cotton wrinkles but is comfortable. It is preferable to dry sheets and pillowcases outside dryers: on a clothesline, a clotheshorse, a shower curtain rod, etc. Otherwise, dry at low temperature in the dryer and remove while damp to stretch it on your bed or on a rod to complete the drying. Cotton will last longer and wrinkle less.
Egyptian cottons are silkier and wrinkle less after a few washings. Turkish cotton makes beautiful towels.
Ironing is strictly a matter of personal taste.
For interested customers, very effective anti-dust mite soaps are now available on the market.
Fabric softeners are not particularly recommended. They block the cotton pores and often leave residues on cottons. If you want to use them, buy brands with a good reputation that rinse off completely.
Cosmetic products containing peroxide or other chemicals may cause orange spots on fabric and other cosmetic products (creams, hair product, etc.) may stain fabrics.