The Claresa Cleaner is the degreasing liquid for semi-permanent manicure, which cleans the nail completely.
Its use is essential to prepare the nail before applying the base, and also to remove the sticky residue (dispersion layer) that leaves the semi-permanent manicure in its last step (except if you use Claresa's No Wipe top coats).
It also cleans professional manicure brushes effectively by dipping the brush in cleaner and drying on cellulose paper.