I'm on about my third Skeeter Pee. I don't put all the lemon juice in at first; I just add one bottle. Let the yeast multiply for a few days, and when it's really bubbling good I add the second bottle of lemon juice. In another week, I'll add the last half a bottle (I make 4 gallon batches) I've never had a problem getting it to start using a packet of EC1118 or Premier Cuvee.
I'm using the 71B dregs from a batch of cider this time, and it's going a little slower but still chugging along.
"Talk very fast, hope something good happens, take the credit" --The Doctor