When the plastic excluders come off at the end of the season they are all placed in a large plastic tank filled with washing soda solution ( Finnie's lye) and left to soak all winter long.
Then jet washed ( place in an old bakery wire tray ) and then given a 20 minute soak in fresh 5% red label dairy bleach... rinsed off and dried... ready for another season.
We do not use excluders on the Rose hives......
Chons da