What are these green colored resistors?
Replace it with a resistor you have that is closest to 0.1&Omega;

Or try 13.6" of 24 gauge wire.

Take a 100mA current reading and see how close the it is to the actual current.  Ballpark will do, just want to know the magnitude. 

From there it's just simple arithmetic.  

Is the current 10x?  Or 1x.

If you need to buy a resistor, try a 0.01&Omega; and a 0.1&Omega;  Tolerance is up to you, smaller is always better.

The first band is likely brown because a 1 makes sense for a current sense resistor value.

The second may be silver where most of it has flaked off.

So my guess is 0.01&Omega;

0.01&Omega; is the most common resistor in that range so would be the most likely value for a current sense resistor.