Couple of things to do – make sure water doesn’t accumulate under the fork boot during winter as the races / fork will corrode. Simple as just lifting the boot, checking and wiping it down.
When you reset, if indeed you need to reset with your version, Tony from thumbprint told me you can spray grease down the interior when you have the topcap off as a general maintenance step.
You can also clean the air filter once in a while.
They’re the simple things to do. Stuff like a full monty strip down and damper oil change was something I always left to the professionals, but can be done yourself if you’re that way inclined. Need one or two special tools.
ETA – If you need advice on the fork then there are knowledgeable folk here, but the cannondale forum on mtbr is the last word – some lefty gurus on there.