Contrary to popular belief, you cant actually closeoropen your pores. But, what youcando is give them a good old deep cleanse. Because with skin aggressors likepollutionand daily grime doing their best to fill your pores with dirt and bacteria, blackheads can seem inevitable.Thankfully, theres a cleanser for that. â MAIN FEATURES â USING METHODS NOTES Use green tea cleansing solid mask interval time: Oily skin: Recommended use interval is 2-3 times a week. Dry skin: Recommended use interval is 1-2 times a week. Mixed skin: It is recommended to use 2-3 times a week for the T zone and 1-2 times a week for the U zone. Normal skin: once a week is recommended. SPECIFICATIONS