Few questions...1. My machine has 3 settings: cold/cold, warm/cold, hot/cold. I use the cold/cold for rinsing but which should I use for washing warm or hotel. 2. How much detergent should I use? I use Tide powder and am washing 8-10 diapers at a time (pockets) as well as inserts, wipes, and wet bag. 3. My LO is EBF and have just noticed a few diapers that still look dirty after washing...are they really dirty or just stained? TIA!