Not Just Any Dehumidifier

A dehumidifier is the plain answer. But not just any dehumidifier. I have been dealing with this issue intensely for nearly 20 years. The only machine that will get you the results you need is one called a SaniDry Basement Air System. And it's awesome.
The SaniDry is a high-capacity, high-efficiency dehumidification system, with air filtration, in a single unit. The SaniDry takes up to 100 pints of water per day out of your basement air, while using the same energy as a 40 pint dehumidifier. And it filters particles out of the air to less than an incredible two microns in size which is smaller than any mold spore or dust mite dropping.
The SaniDry Basement Air System wrings your air dry, and its powerful blower moves that dry air out into and around your basement space. This dry air then dries your building materials and basement contents, which makes the damp smell and damp feeling go away!  What a huge difference a SaniDry can make in condensation season. People really love their dry basement environments after having a SaniDry installed.