Mop pad not getting dried

Post mop cleaning it says mop pad drying but there is no air sent to clean the mop pad

Hi, the fan for air drying works quietly. So you may feel that the pads are not drying. However, you can check by closely trying to hear the fan motor sound by placing your ear as close to the station ad possible.

Thanks for responding. But this is not working after 3 months of use.
I am using this for last 3 months there use to be  more sound while drying mop pad and the mop pad actually got dry within a couple of hrs. Now drying has stopped working. During drying  I can hear a light hum sound but the mop pad is wet even after 8 hours of mop drying!.