try 2 parts each of d-Limonene and mineral spirits, and 1 part of the power steering fluid. I haven't had time to experiment but if you want to play around and report back to me you can get orange oil and d-Limonene in small quantities from Citrus Depot (http://www.citrusdepot....
Jackie I am not sure because I just saved a bottle from some store bought window cleaner that I had gotten at the recycling center but I am pretty sure you could get one at some place like Lowe’s, Home Depot etc. Also I have used a bottle from some fertilizer that I had used up...