Spot clean with a clean, damp rag and mild soap (no detergent). Air dry away from direct sunlight.
Do not store waxed goods in a dark, damp place, as they can attract mold or mildew. If you encounter mold and/or mildew, mix ¼ cup of borax w/ 1 quart of warm water and apply with a sponge to affected area(s). Then mix 1/.5 ratio of white vinegar to cold water and apply with a sponge. Set in direct sunlight for several hours.
To replenish wax to canvas or twill use Original Martexin Wax and follow instructions on product page.