Ok, the picture is now clarified a bit further for me.
Xylene might be the best thing to rinse a (theoretical of course) post reaction solution with. With 3x being the usual recommended number or wash repetitions.
I'd still not recommend using your xylene blend for this though.
Also there are some that recommend rinsing final (crystalline/salted out/hcl/non-freebase) product with an NP solvent to remove any lingering NP soluble garbage from your prized chemical confection. But I've never seen this to be much of a necessity.
Although some peoples stuff may actaully benefit some from an NP solvent rinse. And it's also a bitch to dry it compared to a your standard tone rinse.
Oh, and the title is a lame attempt to suggest subbing the word Xylene for "Eileen" in that crappy old New Wave era pop song.