Lemon Juice & Tea Tree Oil. Tea tree oil prevents excess build up of unwanted oils & infections. Great anti-inflammatory & disinfecting properties. Lemon juice great cleaning compound, works well for pores enlarged by cause of oily skin & blackheads. Create toner by mixing cup lukewarm water with 5 drops tea tree oil & teaspoon lemon juice, then spray onto face. Will shrink pores & keep unclogged.