3. UV light.
Seriously. Leave the instrument out in the direct sun for half an hour, rotating it every ten minutes. Then swab it out/wipe it down. You're done.
It won't kill anything INSIDE the instrument or pads, but quarantining it for a week to ten days over the summer would be sufficient to deal with that. C19 lives on metal surfaces for about 4-8 hours. It lives on cardboard/paper for about a day. In pads? Give it a week to ten days to be 100% sure, but you should be fine.
Now, that being said - mouthpieces and ligatures 100% need to be cleaned your usual way. I soak mine in a 1 part vinegar (slightly acidic)/ 4 parts water/with a dash of soap mix, scrub them with a cleaning brush, then run them through my dishwasher. Be careful with clarinet mpcs, you don't want to ruin the corks. I've found if you LET THEM DRY FULLY before trying to use them, and re-grease them when they're dry, before issuing, they'll be fine.