info particularly useful in regards to covid-19 but otherwise also quite useful
If your watch is decently waterproof (marked 50M or better) then you'll want a small bowl of hot water with dish soap in it and a soft toothbrush, if you don't know what to do with that setup then god help you
If your watch isn't, then clean it with a slightly damp cloth with a small amount gentle soap, using a toothbrush to get at the fiddly bits
Now we want to clean the strap
(cont.)
info particularly useful in regards to covid-19 but otherwise also quite useful
For a steel bracelet, you can use the bowl of soapy water
For leather, use a slightly damp cloth with a small amount of gentle soap, then go over it again with just a damp cloth to remove the soap
You can additionally use some leather conditioner
For a fabric strap (NATO, ZULU, etc.) you can just sling them in the washing machine with your regular laundry