I have been using it everyday for 2 months and usually I use it for 6 to 10 hours a day. It is very easy to operate. I have never clean it yet as it is still working fine! Scent coverage is good too (compared to another brand that I am using)! The reason why I am giving only 4 stars and not 5 stars is the sound. It is a little noisy especially when I am using it in my bedroom. And it would be perfect if it comes in cordless too and I will definately buy it! I am still happy and satisfied with this product.