I read somewhere to try to use a soap/detergent that is phosphorous free. I use gain dishwashing soap now but have seen dish soaps that say "phosphorous free" on the front label. Is it the phosphorous that causes the residue that I find on my stem bolts? At first I thought it may have been low quality bolts on the stock Bontrager stem bolts but after replacing the stem with a Race Face Turbine I am now finding similar residue on the hardware.