If your hot tub is looking a little grimy, it might be time for a deep clean. The good news is that deep cleaning a hot tub is relatively easy, and only takes a few simple steps. First, empty the water from the tub and give it a good rinse with a hose. Next, mix up a cleansing solution using water and either white vinegar or bleach.nnOnce you have your solution, use a sponge or brush to scrub away any dirt or build-up on the walls and floor of the tub. Take care to avoid any electronics or other delicate parts of the tub.nnWhen you're finished scrubbing, rinse the tub thoroughly with clean water. Finally, refill the tub with fresh water and add any chemicals as needed. Once you've completed these steps, your hot tub should be sparkling clean!