I use a super sticker that costs about $100 a gal. It is much more than just a soap. It opens the stomatas to accept more chemical thereby getting it into the plant faster. I use it with many different herbicides. It has on the label that you can reduce the amount of Roundup used when you use it. The amount used is not very high, maybe 1 oz in a 2.5 gal sprayer. I like it much better than Tide! Just kidding, don't get mad.
Take care of your customers and they will take care of you.