I would suggest rooting gel or powder.. Just need to find that happy medium because RW if given the opportunity will absorb too much water, so make sure your getting them wet.. not soaking wet..
If your area doesnt have high humidity then put a dome over them and let some fresh air in there a couple of times a day.
RW is fine to use and many have success with them.. I'm a fan of the bubble cloners myself tho, ez to make, and once you have the right conditions in the container you can have roots poppin out in a week