Finally, spray all bare metal parts and cutting edges with penetrating oil like WD-40 to prevent rust. Wipe wooden handles with boiled linseed oil to help prevent wood from cracking and drying. Warming the oil before use allows deeper penetration into the wood. Hang tools in their proper storage spot so you can easily find them next spring. Sprayers used for insect, disease, and weed control should be thoroughly washed and rinsed.
Most pesticides recommend triple rinsing.
This includes all parts of the sprayer from the holding tank to the nozzles. Tip the sprayer upside down or hang upside down when not in use so that they can drain and dry thoroughly. Some people prefer to use dusters as a way to apply insecticides and fungicides. Keep dusters clean. Tap to remove all materials that remain in the cracks and cling to surfaces.