To clean any traces of glue and cement mortar use a descaler called Fugasoap (KERAKOLL), DETERTEK from FILA brand, because it is specific for the removal of debris from construction works, also used for the removal of other components such as salt, rust an limescale, please read the instructions. DO NOT RUB, let the product act; NEVER USE PADS (SCOTCH BRITE, or NATURAL FIBER) nor SOLVENTS, ACID, ALKALI OR ABRASIVE. After cleaning, rinse thoroughly and ensure sufficient ventilation of the bathroom. It is not dangerous for the user an not dangerous for the environment. For more information, you can check our Youtube channel Acquabella Bath.