Your down items could be soaking up water because the Durable Water Repellency (DWR) has been compromised by dirt, or because it has been cleaned with a conventional laundry detergent. Dirt attracts water and household detergents leave water attracting (hydrophilic) residues, leading to fabric and down 'wetting out' in wet or damp conditions.
If your down items are relatively new, or have been recently treated with Nikwax Down Proof™, then cleaning with Nikwax Down Wash Direct will not only remove contaminants, such as dirt and residues left behind by household detergents, but also revitalize insulation and restore DWR.
However, once the gear has been thoroughly used, you will need to add DWR, using Nikwax Down Proof™, after cleaning first with Nikwax Down Wash Direct. This will add DWR to the outer fabric of the gear and also the down fill.