With a special key, remove the wheels. This key is usually sold in a set with rollers, if not, it can be purchased at any sporting or department store. Inside each wheel bearings is to be disassembled to get and for subsequent cleaning and lubrication. All components of the mechanism motion clips should be wiped off the mud.
The bearings can be of two types: collapsible and non-collapsible. Clean collapsible bearings easy, as they have a dustproof ring, under which there are balls. These bulbs need to wipe and smear a small amount of a special lubricant. We rollers with sealed bearings should remove the dust plate, clean mechanism then secured in the wheel so that its open side looked into the video. Since the inside surface is sufficiently clean and protected, the damage will not be applied liner. Need to be rinsed with water, which added to gasoline. This solution is perfect wash away dirt and oil residue unusable. After thorough washing mechanism must be dried.
Lubrication for roller skates better to choose plastic. Perfectly suited bicycle grease, as they are much longer retain their properties. Not recommended for the lubrication of rollers use grease and kerosene they evaporate quickly and weathered that accelerates wear on the driving mechanism.
If you do not have the ability to assemble or disassemble mechanisms, and you can not self-lubricate the rollers, refer to specialized sport shops - there is always help to maintain for quite a reasonable price.