How far and fast is your ride.
Generally, you can ride fast and sweaty then cool down and clean up, or you can ride slow and breeze off the bike into work.
If you need to cool down, it is much more efficient to do so on the bike. Roll along, generating your own breeze for the last 1/4 mile. Splash some water over yourself if it is very hot.
In winter, you shouldn't need to clean up as much.
Use a sponge or flannel and a microfleece towel.