Your could be soaking up water just because it is dirty!
First, try cleaning it with , and if it is fairly new, or recently re-waterproofed, the Durable Water Repellency (DWR) will be revitalised just from cleaning. But, once the garment has been thoroughly worn, you will need to add DWR, using Nikwax SoftShell Proof, after cleaning first with .
Nikwax SoftShell Proof Wash-In is easy and quick to use in a washing machine and its high level of DWR develops on air drying. The need for tumble drying is eliminated, saving energy and protecting older garments from heat. This product has been specially created for softshell/fleece bonded garments. It leaves a flexible water repellent treatment on individual fibres allowing water vapour out, maintaining breathability.