Damaged flame sensor on furnace

[Monty]

I have a furnace that is doing  a short cycle.   I took the flame sensor and cleaned it with a pair of plyer,   it has not corrected the issue, wonder if I was too rough with the sensor and need to replace it now.  Are they sensitive to a very  rough clean up???

[Jim Katen]

You really shouldn't clean a flame sensor with anything rougher than an emery cloth or a scotch brite pad. 

How short are the short cycles?