Instruction: Answer the given question using the supporting document.

Input:
Question: What is the best way to maintain the filter when the unit is off for the day? Leave it inside or remove it and keep it soaking, or let it dry out?
Document: The tank had mold growing in it within the first week of use. This is even after cleaning this thing on daily basis and let it sit for half the day to air dry. Plus you need to buy a filter for this unit!! !
Works as advertised. Wish it came with a mode that had no light at all. Even the dim blue light of the dial is too bright. Found that if I take filter out of the water each day and let it completely dry no mold problems.
We bought and returned two of these.Pros:Stars are awesome.Noise is pretty descent on the high setting but not quite whisper quiet even on the low setting.Filter is pretty universal.Cons:One of the two broke in the first 10 minutes of use. Motor sounded like it was going to explode.There is a intentional hole in the bottom of the unit that I suppose is there to keep water from overflowing the tray and getting in to the motor.
This works great, but if you run it all day, you'll have to fill it twice during that time. Filters also seem to go discolored fairly quick, so keep some back up filters handy!
Regardless, to add insult to injury, even if I was willing to pay that fee, the part was out of stock! Not happy with that. So if anyone has a broken unit they'd be willing to sell the cap for (at a reasonable price), please let me know as the entire unit is no good to me otherwise.
This unit is quiet and works very well. We highly recommend this unit especially in the winter time when the air is dry.
nice stars, but not enough water output and filter doesn't dry well overnight. kid loves it though, and a good night light.
We were glad at first to have this product and our kids liked it esp the 'starry light'.But in just less than 4 months, the water started to drip from the unit. I think it has something to do with the spring inside it that controls the water. The 'teeth' of the valve that locks the water container also started to break and fall off one by one. So the water can no longer be contained, it just keeps on leaking profusely.Not sure what to do with it.
Also, the lid is easy to remove and place on the base without any leaking.As my second Vicks humidifier and for having a newborn you can't go wrong with this unit. I am very pleased and hope to get a few years out of it.
I imagine that if we still have this when our son gets a little older, he will enjoy it.The humidifier has two speeds, sleep mode, which is a lower speed that you can barely hear but that puts out less moisture, and the regular mode that is a bit louder but puts out max moisture. We always use the regular mode.The instructions say to replace the filter/wick every 1-2 months. Ours gets moldy just inside of a month, but we don't clean it regularly.
Answer: The best way is to let it air out and dry off.  I actually rinsed mine out once to get all of the calcification off.  The unit did not work after the filter became clogged.  I honestly don't have time to take the filter out everyday and let it air out.  I just ordered a 3 pack of new filters so I can just change them when needed.