Rye to wheat starter suddenly inactive
Mixed together a rye starter (water + rye) four days ago. It doubled on the second day and was still robust when I fed it. Third day, I replaced rye with whole wheat. Per recipe, I'm mixing half my starter (40 grams) plus 100 grams whole wheat and 125 grams water. Today my starter has little activity (i.e not doubled) and I did notice that the water I have been using (reverse osmosis) was a bit cold. Just fyi, I keep the starter out on the kitchen table covered with a thin towel.
Questions: Can cold water make for a sluggish starter? I have not been taking the temperature of the water...
Was it wrong to feed the starter while it was robust? Should I have waited until it collapsed? How do I know it's time to feed? Novice here...
Would it help to add more rye?