My Rival crockpot has 4 settings: 4 hours, 6 hours, 8 hours and 10 hours. The 4 and 6 hour settings are labeled High and the 8 and 10 hour settings are labeled Low. If my recipe says "cook on low for 4 hours," should I put it on the 4 hour setting or just put it on the 8 hour setting and give it...