Use alkaline soap to clean the face most thoroughly, but generally not recommended, because the skin has a barrier protection, is a healthy line of defense, itself is weakly acidic, according to the principle of acid-base neutralization, weak alkaline soap containing soap-based soap or cleansing milk cleaning power is the strongest, can better clean facial oil and so on, but this behavior itself is also a kind of damage to the skin, in the long run will destroy the barrier function of the skin. Slightly weaker, there are weak acidic cleansers, such as amino acid cleanser there are many on the market, use 1-2 times a day can be. For people with sensitive skin, it is recommended that you do not use any cleanser and that you rinse with warm, cool water. People with oily skin can use a facial cleanser or regular exfoliation to increase the strength of the cleansing process.