I followed the instructions on the first page and it was easy. Be sure to put everything back together the way you took it apart or you will end up with just two gears like me!. It took two minutes to correct it. The fluid was much darker than the brake fluid which I did at the same time. My rear brake reservoir had clear crystals which I had never seen in brake fluid before.
This is the handiest tool I've ever found for doing brake and clutch fluid changes. I simply remove the reservoir cover, suction out the fluid but leaving the bottom covered to prevent air entering, fill with fresh fluid and hook up this Motion Pro device. You can now loosen the bleeder valve and simply pump the brake or clutch lever adding fluid as needed, until clear fluid passes the valve. Easy one person operation and no need to continue opening and closing the bleeder valve.
https://www.motionpro.com/product/08-0143
Thanks Redbird. Always room for another tool.
Fenian, if you had the moisture checker I bet you would have found it would have maxed out on the reading.