Place your funnel in a glass bottle or jar and slowly pour in the water, vinegar, rubbing alcohol, and optional citric acid.
Remove the funnel and place 12-24 drops of essential oil in the container. Place the lid on and gently stir or shake to combine.
Cut your t-shirt into small squares and set them aside.
If using your cleaner as a disinfectant wipe, place your fabric squares in a large jar. Pour your cleaning mixture on top. Make sure the pieces are damp, but not overly soppy.