NIKWAX TX DIRECT SPRAY ON 1 LITRE REFILL WATERPROOFER FOR WET WEATHER CLOTHING
Your raingear could be soaking up water just because it is dirty. First, try cleaning it with Nikwax Tech Wash, and if it is fairly new, or recently re-waterproofed, the Durable Water Repellency (DWR) will be revitalised just from cleaning.