The almond oil is included as a light emollient, meaning it is designed to deposit a subtle conditioning layer on the skin to prevent the tight, dry feeling that can follow a bath, especially in hard water. It is not a heavy, greasing oil. Most users will find it leaves skin feeling smoother rather than slick or oily. However, individual perception of 'greasiness' can vary based on skin type and the amount of oil used in the formulation.
To minimize any potential residue and ensure easy cleanup: First, always rinse your skin with fresh water after your soak to wash away any dissolved salts and excess oil. Second, to clean the bathtub, simply drain the water and rinse the tub walls with warm water immediately. Any light oil film will typically come off easily with a standard, non-abrasive bathroom cleaner or a mix of warm water and dish soap. Wiping the tub while it's still damp is most effective. The product is not known to stain porcelain or acrylic surfaces. Storing the bath bomb in its original packaging or a sealed container will also prevent any oils from seeping out and making a mess in your bathroom cabinet.