Probably. It will clean the surface off pretty well but won't kill off bacteria very well. You could instead use a steam cleaner or give it a soak in boiling water. That should do a pretty decent job of sanitizing. I think in most cases the risks are pretty low but there is a potential for something dangerous to be carried on items from outside so it's a good precaution to try and sanitize it well. I use driftwood from outside and have never had any issues with it.