Use a damp cloth or sponge as often as you like; however, do not use shampoo more than once a month.
ໃຊ້ຜ້າປຽກຫລືຟອງນ້ ໍາ ເລື້ອຍໆຕາມທີ່ທ່ານມັກ; ເຖິງຢ່າງໃດກໍ່ຕາມ, ຢ່າໃຊ້ແຊມພູຫຼາຍກວ່າ ຫນຶ່ງ ຄັ້ງຕໍ່ເດືອນ.