Not Ethylene Glycol 
Yes, in this form it is easy to get.
Or you can get optic foliar switch used to be the same thing.
The label has changes on switch, so who really knows what is in that now.
Start with 1 drop per liter and try to spray only the areas that have male flowers.
Spray every other day if you feel parinoid or once or twice a week or until you think they are all gone.
You will see them wither pretty fast.
You can spray the whole plant but it is best to keep it confined if you are able.
Try your best not to get any on the roots/dirt.
A little is no big deal.
This should not effect the flavor at all.
This may in fact increase canabinoid production.