Rinsing may be needed both for aqueous and solvent-based processes. A lower-boiling solvent may be effectively self-rinsing. However, in degreasing operations, to prevent soil redeposition, the rinse step is ideally performed in the vapor phase in freshly redistilled solvent. If an operator incorrectly attempts to rinse in the liquid sump, for some applications, contaminants may be redeposited. In addition, some higher-boiling solvents, such as the soy-based or terpene products, can leave enough cleaning agent residue that they must be rinsed either with a lower-boiling solvent or with hot water.