Should I prewash dishes before putting them in the dishwasher?

Well, that depends. If you're not using the right product, it may be a good idea to prewash your dishes. There are a lot of detergents out there that just don’t do a good job of removing burnt-on foods or caked-on messes.
However, if you use Cascade Platinum ActionPacs there’s really no need or good, practical reason to prewash anything you put in the dishwasher, especially your dishes! Cascade Platinum ActionPacs clean even the toughest and grimiest of burnt-on messes in just one wash, with no prewash needed. Its special formula powers away burnt-on foods and makes your dishes dazzle with a built-in rinse aid action.
But those aren’t the only things that make Cascade Platinum a superior product. It even has the grease-fighting power of Dawn. That means no greasy residue stands a chance of getting left behind. As an added extra, Cascade Platinum is specially formulated to help prevent hard-water filming. In other words, Cascade Platinum helps to keep your dishwasher looking fresh and clean. It even works great on silverware!
And that’s not all! Every Cascade Platinum ActionPac has built-in scrubbing power. No need to pre-rinse, soak, or scrub. They’re specifically designed to leave nothing behind but shine.
So if you’ve been looking for a detergent to make your dishes sparkle and shine like new, look no further than Cascade Platinum ActionPacs.