Whisk soaking techniques

There are many ways to soak whisks made of broad-leaved tree twigs. Put a dry whisk in cold water for 10 minutes and then keep it wrapped in a wet towel until the steaming session.
A whisk prepared this way will be softer, but, soaked for a long time, it will lose its benefits because some useful substances containing in leaves will drain into water.
Or you can hold the whisk above hot sauna stones (keep turning it). The leaves will become bright green and the twigs more flexible.
It is also advisable, 7–8 hours before steaming, to splash first cold and then hot water on the whisk, shake it to drip off water and put in a plastic bag until steam room.
In the steam room, put the whisk for some time in a bucket with hot water and cover it with a bowl.