Somewhat related, my wife and I use one of these sprayer bottles (Walmart) for 91% alcohol that I buy and refill from bulk bottle.
After each teeth brushing, I rinse and wipe the shank of the brush to remove most particulates, then spray the shank and bristles generously, after which I top the brush head with the plastic provided (Sonicare) cap.
began this practice after listening to our dentist spiel (probably from the toothbrush industry) to dispose of our toothbrushes after 3 months of use because of bacteria buildup.
3 months? Where's the science on that one?