As soon as i start chatting I bring up the fact lot's of girls ask for cash and how as a stranger do they expect me to send them £300 after 20 mins of chatting.
I then gauge how the girl I'm chatting to reacts.
I also ask for total honesty and ask if they are regually chatting to anyone else,I also tell them if I am.
I believe it's the beat way.
I'm doing that very thing now-I have 2 girls who I chat to often and hopefully that will be down to one-which one i have no idea yet.
I think chatting to a couple helps in the fact you should not put all your eggs in one basket til you are sure.