We rinse our bottles on a custom made bottle wash with spirits. The spirits are run a particulate filter and after about 1,200 bottles the filter and spirits are changed. The filter is filthy with a gray tint just after 1,200 bottles. I'm not sure how clean bottles are from other manufactures but ours are from China. The last thing I would do would be to put the spirits back into the bottling drum. We also wash the outside of the bottles with a vinegar solution.