Thank you. Good advice. What type of heads, good question. I really can't figure that one out. Would it be a good idea to have a set of wires with less than 20 strands?Fresh pair of heads and a New wire would be a good place to start.
What type of heads depends on what type of sound you are after.
If that dosn't work out, i would check the edges to see if they are still good.
If they are bad, have some one who knows what they are doing re-cut them.