Now that depends first of all, have you gotten is stuck or have you been tugging on it? That is the first thing to try to avoid, if your not sure of the topographical of the inside of your well casing you may not be using the right tool. If the inside of your well casing is rough with calcium, lime or iron deposits and you get the probe stuck on any one of these, tugging will result in only one thing, a loose probe. What I would do is unroll the cable and do a really good visual inspection, if you do not see anything-that is good. Next run your hand up and down the cable and see if you feel any small nicks or cuts in the cable, this means a possible bad wire. Most of the time we find that this is the case, if you have a loose probe you can replace it, otherwise you may send it in for repair.