Monicas, I had the same thing happen to me last time with my LG.
I What I did this time is put a small shallow cup in, then put just a bit of a washcloth in the cup and spread the rest of the washcloth out on the mesh to get more surface area. The water wicks into the washcloth from the cup. I positioned my cup right under the back vent hole so I could use a funnel to add water as needed. So far so good.
To help keep the humidity up last time, I didn't open both vents, just one.
HTH