Using it again is fine if the maker lists the head as washable — shake the water out first. What causes rust is putting it away wet: water left between two steel plates.
Rinsing is correct and encouraged. Most of the tools on this site are published as washable or fully waterproof, and several are marked 100% waterproof.
What causes damage is reassembling and storing wet, because the gap between the plates holds water where nothing evaporates and nothing gets wiped.
The order that avoids it:
Rinse under running water, where the maker states the head may be rinsed.
Shake and tap out the standing water.
Dry fully, apart if the head separates, and give it real time rather than a wipe.
Then oil, if the maker states the blade needs oiling. Oiling a wet blade traps the water underneath the oil.
A tool used in the shower, which several body groomers here are built for, needs the same treatment afterwards — waterproof describes what the machine survives during use, not what it should be stored holding.
Rust on a blade is nearly always this, and it is nearly always the drying step that was skipped.
Check your own manual before you follow anything here. Temperatures, water ratings and supply voltages differ from model to model, and the maker’s own figures take precedence over anything written on this site.
Last reviewed October 11, 2026