Basically the methanol replaces water. I typically dilute the Methanol/
soap mix 1:8 if the temperature is between freezings and mid 20s if it is colder I see it in without a tip (typically 1:4 witha standard hydrominder) this typically with keep it thawed down close to zero.
Do the math with the foam brush chemical you are using. In my example, if you dilute 1:8 at the hydrominder you will want to dilute at 1:30 in the
soap/methanol mix this with get a final dilution of 1:240. It will be more chemical rich if drawn in at 1:4 for cold weather. If the product you use has a recommended dilution of 1:120 I would do the Methanol/
soap mix at 1 part
soap to 15 parts water. (1x15)x 8 = 1:120
I want to try dual injection but have not at this point. It would be nice to not have to mix. And to just vary the Methanol amount while keeping the chemical consistent.