Bearings last longer if you keep them dry and well lubricated. Understandably bearings can get dirty, especially if you skate outdoors; they are also one of those easily forgotten items to maintain. The good news is that Skorpion Skates use Rubber Sealed bearings so dirt and grime should not get into them. If you feel that the factory standard Skorpion bearings are stopping you from having a smooth ride, it would be best to replace them.
If you have customised your skates with different wheels (or if you have skates besides Skorpions) we suggest that you clean the bearings from time to time to extend their life.The video below explains how to do this.