Leopard geckoes are really not fans of soaking...I set my humid hides up with a wet paper towel as the substrate inside the container they crawl into and that is sufficient for a clean she every time. I personally don't think the wet q-tip idea is even necessary as long as they have a moist place to put their feet on.

However, be sure to offer a humid hide at all times. I spoke to a breeder recently and he said that when leos are exposed to excessively dry conditions over time, it can cause respitory issues. I use a overhead heat source, so I've got to be aware of that. If you use a heat pad or flexwatt or whatever, you shouldn't have too much of a problem with overly dry conditions elsewhere.