The fan stopped working on my Miro
Are you using purified water in the Miro? Sometimes when purified water is used, the water sensor in the unit gets a false signal that the humidifier is dry and turns the unit off automatically. If that happens, add one or two cups of tap water and it should solve the problem.
If that is not the issue, the opposite could also be happening -- the fan could be stuck from overuse of hard water. If hard water is used in Miro, minerals can accumulate inside the fan and makes the fan stop. If this happens, you can unassembled Miro to clean the parts, and try again with filtered water.
To see how Miro is unassembled, see this video.