Many times after one relieves themselves there will small drops that fall on their undergarments afterwards. Does one need to be mevatel that urine found on their clothing with water before they can Daven or make brachos?
You do not have to be mevatel the urine sine it is covered with another garment and it isn’t visible. there is however a preference to be mevatel it, however it is more of a midas chasidus then a halacha.
Shulchan Aruch O:CH 78, Shulchn Aruch Horav 76-2, Piskei Teshuvos 78-2.