It is important to clean your Wedgle Direct-Inject unit to keep it from clogging or corroding when you put it in storage. After removing your chemical pack, make your last injections for the day as there is approximately 2.5 ml of chemical retained in the injection unit. Submerge your unit in a bucket of water until the top QC coupler is underwater and squeeze the handles five to ten times. Then remove the injection tip from the unit and replace the dust plugs on both QC couplers. Or click here under maintenance for water flushing with the garden hose adapter.