Keep dry and ventilated: Avoid long-term contact of bamboo coasters with moisture, keep them dry and ventilated to prevent the regeneration of mildew spots.
Use mildew inhibitors: You can use natural or chemical mildew inhibitors, such as tea tree oil or lemon oil, and spray them on the surface of bamboo coasters after dilution. Chemical mildew inhibitors such as mildew spray or mildew paint should be used according to the instructions.
Regular maintenance: Check the status of bamboo coasters regularly, and deal with minor mildew spots in time. Wipe the surface with a soft cloth dipped in vegetable oil or beeswax every once in a while to form a protective layer to prevent moisture penetration
