Fskof:
As briarpatch has suggested, the sprayer nozzle and the dilution ratio (water to product) make a big difference in how much Bug Squash is used. I use it at 3:1, but 4:1 might be OK if the bug splat is not heavy or baked on (IE, it has not been there for a week in the hot Wisconsin sun. Grasshoppers are the worst! That splatter WILL etch your front bumper/grill and hood paint. Or if you live near Lake Winnebago or the Bay of Green Bay, a lake/bay fly mid-spring hatch that you drive through. Or ANY insect hatch by Wisconsin`s waterways!)
Let it dwell (2 or 3 minutes) on bug splatter, but I would not suggest doing this in the hot sun, even though Poor Boy`s World products are "designed" to be used in the sun. I use a bug pad to help "rub off" the bugs, but some say they are too abrasive and will scratch your paint, which it will do it you rub too hard. But then that is why you are using Bug Squash, so you will not have to!
I would suggest to buy a gallon of it. Depending on how many vehicles you wash or how frequently you wash your own, you`ll find yourself using this product with EVERY late-spring/summer/early fall vehicle wash. You know what bugs are like in Wisconsin, as mentioned above. Cannot wait for spring`s warm weather, until the bugs come out; then cannot wait for fall`s first hard frost to kill them!! Edit: PLUS, I am sure your friends and family will be asking for "samples" of this product that works so well on bugs, so you`ll need a "little more" to go around and share (or if you are the entrepreneurial type, to trade for venison jerky or a "limited edition" micro-brewed beer with them. Hey, nothin` is FREE.)
I would suggest a good chemical-resistant nozzle, but one that is NOT a high volume. Do NOT use the nozzle from a Spray Master bottle. I bought these from Mills Fleet Farm (you know the store, since your are in Wisconsin) but they spray WAY too much product. Bottle is OK, the nozzle is not, especially if you use it with an acid-type wheel cleaner; it gets eaten alive and will not last. This is the one I suggest from the Autopia Store:
https://www.autopia-carcare.com/chemical-resistant-trigger-sprayer.html#.XMMKNTBKj3ghttps:/
OR
https://www.autopia-carcare.com/acid-resistant-sprayer.html#.XMMKeDBKj3h
Another suggestion: keep the a small spray bottle of this product mixed 3:1 in your vehicle for use on the front windshield when you fill up your vehicle with gas and use the gas station`s bug squeegee to clean off the front windshield (or headlight covers if they get heavily splattered) between vehicle washes. Makes it a lot easier to remove that bug splatter.