Please use a dry erase pen (water-based) to use.(Do not use alcohol-based markers, as it may leave a little mark) When you erase your writing items, the dedicated eraser or wet towel will quickly disappear instead of a general cleaner.Since it is made of PVC material, please understand that there may be a slight peculiar smell when opened.Therefore, after opening, place it in a ventilated place for about 2 days to disappear.