2008 2500 170" EXT
Steel ball-bearing sliders were never a consideration for my systems.Both of these DIY projects, like many others, used ball bearing drawer slides. Everlanders washed out all the lube from the slides so they would not collect dirt. But they still needed to clean them with a pressure washer regularly. Using Unibearings as Orion is doing should work much better.
Lube them, even with dry lube, and they 'grit up' quickly.
Without lube, even chrome plate will wear off and corrode.
If snow or ice gets in a bearing slider.... get out your blow-dryer.
Mine do not require lube, nor is it recommended that you do. To clean them, just use a garden hose or pressure wash just like you do when you wash the van.