Must one wash his hands upon touching the covered areas even if he is clean from sweat, such as if he just took a shower?
Some Poskim[1] rule that in such a case one is not required to wash his hands, with exception to one who touches his feet.[2] However practically it is suggested to be stringent and wash the hands even in such an instance.[3]
[1] Kaf Hachaim 4:85 in name of Ruach Chaim 2
[2] Regarding the feet Kaf Hachaim 4:73 explains that according to the Mekubalim the evil spirit which resides on the feet is very strong and does not move from its place even after being washed. [Kaf Hachaim in name of Yifei Laleiv 1:22 and Mor Uketzia 4; Rav Poalim 2:4; Torah Leshma 13] However see M”B 4:54 in name of Peri Megadim 92 which implies that the feet has the same law as other parts of the body.
[3] Piskeiy Teshuvos 4:56; Vayeishev Moshe 2:12; Halichos Sholomo 2:15 in name of Rav SZ”A.