I've read all of the how to guides and what not, but I still can't successfully prep a shot of morphine!!! I've tried Kadians, Avinza's, and MS Contin's. They all seem to either gel up or for some reason, the needles plug up or draw up cloudy as hell. I use a cotton to filter and everything. For some reason, I just can't get it. Any tips or ideas what is going wrong? I use a 28 gauge, 1/2" needle. I heat the solution slightly and have tried without heat. Same thing each time. WTF??? Any help is appreciated.