there was a similar post on this subject recently.
contact that mfgr and see if there was anything in there that may be harmful, chemicals, etc.
after that, the solids, glass, bearings, etc, are going to be heavier than the beer and settle to the bottom of the brewpot. anything that gets tranfered will settle with the trub in teh primary. if you rack to secondary, again, anything that might happen to get carried over will settle to the bottom.
if you leave a little in the bottom of each before racking, i personally wouldn't worry about it. the choice is up to you though and no results are guaranteed.