I see in the instructions and in some other manuals for poly-lysine coating that slides must be cleaned 'before attempting this procedure. Clean with acidic alcohol (i.e., 1% HCl in 70% ethanol) if necessary.' However, I don't have this HCl solution available and am wondering if I can simply wash them with regular dishwashing soap, and/or 75% ethanol, and/or acetone? My purpose is to use these slides for IHC of brain slices. Thank you!