I have to disagree. To clean a filter means breaking it down, not backwashing or bumping....Carts are the EASIEST to clean!
Evan,

I swore I would never get involved in this interminable (and redundant)argument but you have misspoken.

You "clean" a sand filter by backwashing....no further "cleaning" is necessary. It is misleading to inexperienced people to imply that carts have a lower maintenance load.