I ride with someone who goes through tissues like mad and some days constantly stops to use them. I joke that they really need to just let it go. When I'm alone on my commute I sometimes just let it run and build a nice little snot mustache and then just blow it off. My gloves can only carry so much afterall.

And if you are worried about others snot rockets just use fenders all year round so it doesn't get flung up at ya.