Experts define "makeup buildup" as a layer of residual cosmetics, dead skin cells, and environmental pollutants that regular washing fails to remove. This accumulation can lead to dullness, clogged pores, and uneven makeup application.

Effective Removal: The Double Cleanse Method
The most effective way to eliminate buildup is a double cleanse routine. This involves two distinct steps: 
Oil-Based Cleanser: Apply a cleansing balm or oil to dry skin. Massage for at least one minute to melt down stubborn products like waterproof mascara and SPF.
Water-Based Cleanser: Follow with a foaming gel or cream cleanser to remove any remaining residue and deeply clean the pores.