Which product is typically used to remove excess oils from cosmetic brushes?

Brush cleaner is specifically formulated for cleaning cosmetic brushes, making it the most appropriate choice for removing excess oils. These specialized cleaners effectively dissolve makeup residue, oils, and dirt that accumulate on the bristles. Using a brush cleaner not only ensures that the brushes are hygienic but also helps maintain their shape and longevity by penetrating the bristles without causing damage.

While soap and water can be used for cleaning brushes, they may not be as effective in dissolving heavy makeup products or oils as brush cleaner is. Alcohol may effectively sanitize brushes, but it can also be very drying and potentially damage the bristles over time. Astringents are designed for skin care and do not have the properties necessary for effectively cleaning brushes. Thus, brush cleaner stands out as the ideal product specifically tailored for this purpose.