If it's a clear day, it may be tempting to put these outside to dry. Do not do this as direct sunlight will damage your keycaps.

Rinse the keys under room temperature tap water for 2 minutes.

Shake each keycap to free any excess water and place them on a dry dish towel. Ensure the keycaps are not stacked on top of one another.

Air-dry the keycaps on a dish towel for at least 24 hours or until completely dried.

If you cannot wait 24 hours, you can put the keycaps in a cloth bag and use a hair drier to blow hot air onto it for 10 -20 minutes.