Why Should I Clean Essential Oil Bottles? Essential oils!They’re like little drops of nature’s magic, aren’t they? From lavender’s calming whiffs to peppermint’s invigorating zephyrs, these oils enrich our lives in myriad little ways. But cleaning essential oil bottles isn’t just about tidiness; it’s about preserving the purity of your future blends. Residues, however minuscule, can alter the scent and efficacy of new oils you add later. Trust me, I learned this the hard way!