I don't have one, but did find it online. It kinda looks like you just plug it in and turn it on. the cycle lasts 8hrs. My guess is if it needs to be cleaned you just wipe with a damp cloth. You could try looking online for the company that produces it and see if there is a manual that you could down load. I think one advantage over the dry and store which is what I have is you don't seem to have to purchase dry bricks, so there is no extra costs for you.
I hope you can find the answer to your question somewhere. good luck