It would also depend if you have hard or soft water. I have stayed in parts of the country that have soft water and you can not wash off all the soap. In Dallas, we have hard water, so I use Bath & Body Works soap. It cleans VERY good and gets all the oils off. I get a VERY good grip.
Also, try this. Take a shower making sure the water is concentrated on your dingus. After 5-10 minutes, dry off willie and your hands, apply powder to your hands. I prefer Gold Bond Medicated - kinda tingly, and get back in the shower. Just don’t get your hands wet. You get a great grip that way.