Should I be cleaning under my sons for skin? He’s circumcised.

He’s a year old now and my MIL told me I shouldn’t be cleaning it? Whenever I do diaper changes I wipe and pull back a bit and wipe there. During bad time I do the same thing.

Should I not be doing this? I only started because one time I noticed a piece of lint on it so I pulled it back to clean it and ever since then I’ve just been doing it to avoid that from happening...