Do You Need Double Cleansing in a Humid Weather?
Most people treat double cleansing as a nightly rule in humid weather.
Double cleansing is only worth doing when one wash cannot remove your sunscreen or makeup. If your cleanser removes both in one step, you do not need a second wash.
What is double cleansing?
Double cleansing means washing your face twice in one evening. The first wash uses an oil-based cleanser or balm. The second uses a water-based cleanser.
The first step does the heavy work. Sunscreen, makeup and sebum (the oil your skin makes) are oil-based, so the first product has to dissolve them.
The second wash removes sweat and leftover residue.
Does humidity change the answer?
Humidity in Malaysia and Singapore ranges from 70% to 98% through the year. Humid heat makes skin feel oily and sticky by evening.
That sticky feeling is not proof of heavy buildup. What you wore matters more than the weather.
Oily skin does not automatically need two washes either. One gentle cleanse removes excess sebum. Washing oily skin harder leaves it tight and irritated, which is not the same as clean.
Can one cleanser replace the first step?
Yes, if the cleanser is made to remove sunscreen and makeup.
A 2019 study in the Journal of Cosmetic Dermatology tested 20 volunteers. It measured how much sunscreen stayed on the skin after cleansing.
Sunscreen remaining (non-water-resistant / water-resistant):
• Water only: 54.0% / 59.3%
• Water-based cleanser: 15.6% / 36.8%
• Cleansing oil: 13.4% / 5.8%
Water and a standard water-based cleanser leave water-resistant sunscreen behind. The first step has to be built for removal. The sample was small, so treat the numbers as a guide.
Cleansing oil is one way to do that. A dedicated makeup-remover cleanser is another.
Our Micro-Molecule Gentle Cleansing Solution is a makeup remover, cleanser and toner in one step. It removes sunscreen and makeup, needs no rinse and does not dry the skin. For most evenings, that is the whole routine.
When is a second wash too much?
Every cleanser contains surfactants, the cleaning agents that lift oil and dirt. Surfactants also pull lipids out of the skin and can stay in the outer layer after rinsing. A 2012 review in Dermatology Research and Practice links this to a weaker skin barrier.
Washing also changes skin pH. A review in Current Problems in Dermatology found that surface pH rises after one wash and can take several hours to recover.
A second wash adds a second exposure.
Skip it if:
• you wore no makeup and stayed indoors
• one cleanse already left your skin feeling clean and comfortable
• your skin feels tight, stings or looks red after washing
What should your evening routine look like?
Ask one question: did you wear sunscreen or makeup today?
• Yes: remove it with a cleanser made for the job. Add a second wash only if your skin still feels coated.
• No: one gentle cleanse.
In the morning, one gentle cleanse is enough.
Try the Micro-Molecule Gentle Cleansing Solution and you never again need to double cleanse or 3 different bottles to remove makeup/sunscreen, cleanse, and tone.
Double cleansing is for the days your skin needs it, not for every night by default.
Sources
• Humidity range 70% to 98%: FAO, climate of Malaysia
• Sunscreen residue table: Li L. et al., The best method for removing sunscreen: water, cleanser or cleansing oil? Journal of Cosmetic Dermatology, 2019. Seen via a Typology summary. Check the original paper.
• Surfactant effects on skin barrier: Dermatology Research and Practice, 2012