Remove greens from beets and try not to cut into the beet itself, the beets will bleed while cooking if so. Use the greens in another recipe or discard. DO NOT PEEL THE BEETS YET. Wash and add to the slow cooker.
Pour over the water and sprinkle over the salt.
Place the lid on the slow cooker and cook on low for 8 hours or high for 4 hours.
Take the insert off the heat and let the beets cool down enough to handle.
To peel the beets, use a paper towel and rub off the skins. Avoid washing the beets for this may rinse off some of the flavor.