Here is what I did. Disassemble the part of the scale that holds the agate pieces that the beam balances on, and clean all parts, including that section of the main scale body casting, with isopropyl alcohol and Q-tips, until there is no more dirt or oil residue. Clean and inspect the knife edges, removing any burrs that are the result of mishandling. Reassemble the scale, level the base with a torpedo level. Set the scale to exact zero. Add small bits of any durable material to the scale pan till it balances perfectly, then add the material to the chamber under on the underside of the pan holder. This assumes that your scale is built like an RCBS 10-10. After rechecking to make sure that the scale is perfectly balanced with the base level, weigh the brass weight that comes with the scale, and any other check weights that you have access to. Better yet, check it against a high quality electronic scale, or another balance scale that you trust. I did two this way and they work better than new. If yours doesn't, send it to Ohaus.