I have a foresking and I wash under it the same way I wash my hair, my face or my body. If you don't take care of your foreskin, probably you are not taking care of any other part of your body.
I probably explained myself wrong. In my previous comment, I wanted to say two things. 1) I do not like, aesthetically speaking, a long foreskin. 2) Based on what I have just written, being "equipped" with a medium length foreskin, I would therefore like to have a shorter one. I have excluded the debate about hygiene a priori, as it is of no importance to me. And in fact, not surprisingly, I specified "beyond the debate about hygiene". However, I am aware that as soon as these issues are discussed, this consideration is always brought out. It was not my intention nor to offend/despise anyone, nor to claim that a long foreskin is dirty...