When using a shop vac wet, ensure the water filtration system is properly assembled and filled. Connect the wet/dry hose and nozzle specifically designed for wet applications. Test the suction power on a small area to adjust the settings accordingly. Proceed to vacuum the liquid spills or water damage, being cautious not to overfill the collection tank. Empty and rinse the tank regularly to maintain optimal performance and prevent clogging or damage to the vacuum cleaner.