Typically, most accessories purchased since 2012 can be repaired. Call IHT technical support at 801-889-2224 for an RMA so we can evaluate the situation. Before calling, make sure that the connector plug is inserted all the way into the correct port in your unit.
Also try swapping in one of your spare accessories to narrow down which one is not working and try to take a reading using just the accessories to remove the possibility of patient/client dehydration,
MSA – Touch the tip of the stylus directly to the handmass.