oooh how exciting. I am very jealous
To get up to full absorbency most people say cotton needs washing about 3 times, bamboo and hemp lots more.
But what I tend to do is maybe wash just once to make sure they are clean and then accept that they maybe will need changing more frequently in the beginning until they have been washed a few times.
Depends how impatient you are
If you do wash them more than once, then you don't need to dry them in between, just keep switching the machine back on.
Do you have anything you can stuff the MT with to try it out?
Can't wait to here how you get on. I hope you like them.