Caring for Handmade Cotton Textiles
Check the maker instructions first. In general, avoid unnecessary washing, treat marks promptly, use mild detergent, avoid bleach, support wet weight, dry thoroughly in shade, and store clean textiles in a dry breathable place. Repair loose stitching early so a small issue does not become a larger tear.
Public source: https://www.si.edu/mci/english/learn_more/taking_care/care_textiles.html