I have a brick driveway and a brick walkway. There is no grout between the bricks. In the sunny areas, small weeds grow between the bricks. In the shadier areas, moss grows between the bricks. The moss isn't that slimy moss like in How do I remove moss from an outdoor brick walkway?. It's just the dense, fuzzy stuff between the cracks.
I just spent a couple hours clearing one walkway's cracks with an old debit card. It looks great now. The driveway and other walkways are next. There really isn't all that much, but I'd like to discourage future growth if possible.
I've heard vinegar might be an option. Does vinegar work to discourage moss, or is it only good for weeds? Is there a better natural way to do it? I've seen suggested filling the cracks with sand, but at this time, I'm looking for a spray option, rather than adding sand to the mix. (Unless of course sand is the best option.)