Flush method - same as other transmissions.
I am showing 60,000 miles for the fluid replacement interval on the CVT.
Also - When carrying out a fluid change interval, the installation of a new high-pressure case filter and seals is required.
This is different from the typical transmission pan and filter. Do not change that for the normal interval.
I know this is very confusing...to sum up:
Have the transmission fluid flushed with the appropriate CVT fluid at 60,000 mile intervals. Replace the high pressure case filter and seals at this time also concurrently.