I use the green disposable brush picks instead of floss (made by GUM). My dentist says those are great and it's fine to do instead of flossing if I prefer it (in fact, the package says in a study, they removed more plaque than floss).
My hygienist told me morning or evening was fine, whichever one meant I would actually do it -- and it do, religiously. I do it after brushing, but I don't know which is better.
I like the picks much, much better than floss. I find them easier and quicker and I do a better job. I used to floss and they kept telling me I needed to floss (even though I was) so I think I wasn't doing it right. No issue with the picks.
Oh, and with the floss, I don't end up with gunk on the mirror.
