You blokes are good!
I don't bother with it. Mine are always wet either with water/sweat. If its muddy I hose the outside off, but usually don't even bother cleaning them.
Avoid leaving wet socks in them, avoid keeping the boots in a box/gear bag/confined space. Allow to dry naturally with some ventilation. Might stink the morning after a ride if still wet, but generally no issues.
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