What disinfectant can I use on used LEGO parts? Possible Duplicate:
  LEGO cleaning techniques and tools  




I usually purchase LEGO parts at yard sales and the like and would like to disinfect them before using them.  Can I use any spray disinfectant on parts without ruining them?  Should I be wary of any disinfectants that would cause LEGO parts to fade in color?
In the past I have used dish soap and a basin and just soaked them in hot soapy water for a while. I then learned that MegaBlocks float while LEGO sink.