How much Country Save do you use? Do you do a prewash first? How clean is the water during the wash cycle? If it's very polluted water, no detergent will be able to clean well. If you're using very little detergent (1-2 tbsp), you might need to use more.
Also how hot is the water? Hotter water will boost the detergent's cleaning power.
Three kiddos -- b/g twins 2007 and YDS 2011