Most likely you need to clean your humidifier and change your filter, especially if you are running it every day. There are many web sites that have different suggestions on cleaning your humidifier. Some use vinegar or hydrogen peroxide.
When I clean mine, I use 1/2 cup of bleach and then fill with water. Then I run it out on my patio for 20 minutes so all the parts get bleached. If you can't run it outside, tape up the opening. When it is done, I dump the bleach solution and run it again outside with clean water. This seems like a lot of work, so next time I might try one of the methods online! You might also want to check your instruction book, and see what it suggests. Best wishes, M.