Cleaning Pattern

AFAICS CCleaner wipes free space with zeros.

It would be nice if there were other options (e.g. pseudo-random bytes; compliment of character, all 1s) selectable by pass for the milti-pass methinds

If only one option is possible, my preference if fior pseudo random character.

The multi-pass options do use different patterns but finish with a pass of zeroes. I think that this is too complicated to apply to multi-pass wipes, especially as there is little advantage. For one pass. who knows?