Stop Blemished Skin! – BIODROGA Medical Institute CLEAR+ line offers a dermaceutically based care concept especially for impure skin. Salicylic acid in the CLEAR+ line creates the foundation for a cleared and even look of the skin. Salicylic acid is one of the BHA acids. BHAs are liposoluble. This means that salicylic acid can penetrate the sebum produced by the sebaceous glands and dissolve thickened cornified skin and dead skin cells.