It was hot and sweaty, so I washed it with warm water. I checked it recently, and if I wash it too much, it will wash the oil off my skin.

Without using shower gel and soap, bacteria in the body are more likely to be mentioned and have an odor. It won't do any harm to wash off the oil on your body, except that your skin feels tight. You can use moisturizing soap and the like. There is really no limit to bathing in hot weather. Don't use water that is too cold and irritating.