Funny tasting coffee

Vinegar/water cleaning is a good idea, but it won't necessarilly solve funny-tasting coffee. First, replace your charcoal water filter - you can get the Cuisinart brand-name replacements at Lowe's, Bed/Bath/Beyond, or Williams-Sonoma in most areas.

To do the vinegar/water cleaning, just pour 1/3 caraffe distilled white vinegar and 2/3 caraffe water into the water reservoir and brew it like it was regular coffee - I would simply bypass the self-clean function if your Cuisinart has one. Repeat up to 3 times, using a fresh batch of vinegar each time.
(if you have the caraffe-less DCC-2000, then just pour in 4 cups vinegar and 6 cups water).

Then run a full cycle of water. Then run a combo of 12 tsp lemon juice and 12 cups water (or 10 tsp and 10 cups water) to improve the taste.

On your next batch of coffee, use bottled water just to rule out any possibility that your local water supply may be contributing to funny-tasting coffee.

Now your coffee should be tasting fine again.

-Tha Mp3 Doctor