iPhone 5c won't turn on after cleaning camera

To answer your last question, yes that definitely could be the issue here. Keeping your battery plugged in while working on the phone can cause the logic board to get shocked and shorted out. That is probably what happened. So it doesnt show signs that it is coming on at all? like it does not vibrate or anything? it just completely wont come on?... If it doesnt, i would suggest taking it to apple, or sending it in to see what they say. I wouldnt tell them that it has been open or anything because they can turn you down for that. If it shows signs of coming on, like vibrating, making any sounds then its possible to be fixed, but that would require some expensive micro soldering work. And still in this case its cheaper and better to talk to apple. I hope This was of some help!