I didn’t see anything on this recently so figured I’d post this for those who would like to make their own.    Fiebing’s dye reducer is  85%-95% ethanol and 5-15% isopropyl alcohol.    you can make your own using an 8:1 mixture of denatured alcohol and isopropyl alcohol. Cheaper than buying it in the bottles.    denatured alcohol is a slightly weaker ethanol mixture. I did some experimenting and found that even an 8:1 mixture of homemade reducer worked the same as fiebeings