David Kerber brightened my day with his incisive
wit when in he conjectured
that:

Personally, I think once a month is plenty unless you've been riding in
wet conditions (as soon as it dries), or you put big miles on t(hen
maybe weekly). After every ride seems like serious overkill to me.

Cycling around Hamburg in Germany means I clean my chain about 2 or 3 times
a week : the roads are saturated with salt and grit from anit-freeze
measures. The efficiency difference following a chain-clean is noticable.