In this post, Using polysorbates in our products, Jennifer asked: In making a room spray &/or bug spray I can't figure out the ratio to help my product not be so milky. I've been using a 1:1 ration essential oils/polysorbate 20. Does anybody have a suggestion on a better ratio for a more clear product" (Example 1 tsp essential oils in a 4 oz bottle I've been using 1 tsp polysorbate 20..mix that well and then add distilled Water) Thanks!!

Polysorbate 20 is a solubilizer, meaning it can help emulsify small amounts of fragrances or essential oils into water. It has the potential to make clear solutions, but I've found that isn't often the case. You could try using more polysorbate 20 in your products - say a 2:1 or 3:1 ratio. This ratio will vary with the different types of essential or fragrance oils you use. Keep really great records about each and every fragrance or essential oil ratio you discover, including the name of the company from whom you purchased them as these things can vary from vendor to vendor.  Please use weighted measurements when making products as it's much more accurate. You are likely not using 1 part essential oil to 1 part polysorbate 20 as 1 tsp of each won't be the same. 5 ml of essential oil will weigh about 4-ish grams, while 5 ml of polysorbate 20 could weigh 6-ish grams. That's a big difference! 
If you aren't getting the clear product you want, consider a few things...
1. Try putting it into an opaque bottle. I know this seem...