Having occasional problems with the connectors for MR16 bulbs going bad after changing the bulb a few times. Seems the connection loosens up. Anyone have any suggestions on a fix for this instead of replacing the connector? I have one house that uses many differant brands of lights (most from other countries) and since not all connectors are the same, it can get expensive or difficult even to get. Most of the lights are Iris recess and those are very expensive.