Firstly, facial soap can Dehydrate your skin
Soap of some clean face increases lubricious effect, joined many grease composition, acidity alkalinity still is neuter and even alkaline, although feel slippery after using, actually, restrained skin however natural protect wet the activity of factor. These problems won't necessarily show up after a clean, but they can leave your skin dehydrated.
Secondly, where is the skin dirty
The MM of a lot of dry sex skin has such doubt, the skin does not give oil, look clean, where is dirty after all? Dirt on the skin can be divided into three types: oil soluble, water soluble and insoluble. Oil-soluble dirt mainly includes sebum, emollient residue, waterproof cosmetics; Water-soluble dirt comes from cosmetics, hydrophilic emollient muscles and soluble skin secretions. Insoluble dirt includes dead skin cells, some metal ion deposits in hard water, etc. The MM that does not love to wash a face in the evening was careful, there are so many dirty things on your face every day, can you really take them overnight?