Be sure to wait at least 4-6 hours after application of Ortho Weed B Gon Weed Killer For Lawns Ready-To-Spray 2 or until the treated area has dried to irrigate the area.
The label for Ortho Weed B Gon Weed Killer For Lawns Ready-To-Spray 2 states that for northern lawns you would apply 2 oz per gallon for every 500 sq ft and for southern lawns 1 oz per gallon for every 500 sq ft.
Ortho Weed B Gon Weed Killer For Lawns Ready-To-Spray 2 does not need to be watered in after the appliation. While this product is rainfast in 1 hour per the manufacturer, the product label advises DO NOT apply when raining or when rain is expected the same day of application to prevent runoff.
We would recommend turning the water flow of your hose off and shake the container to listen or feel for some of the concentrate inside the bottle. The Ortho Weed B Gon Weed Killer For Lawns Ready to Spray concentrate is also an amber-ish colored liquid, so you should be able to see a slight color change when it runs out. You can also use the coverage area the manufacturer states that product should cover to help you determine when you should be close to running low.
It is recommended to not mow within 2 days before or within 2 days after applying Ortho Weed B Gon Weed Killer For Lawns Ready-To-Spray 2. Regarding the issues you are having with the rpoduct, we would recommend reaching out to the manufacturer directly for troubleshooting any issues with their sprayer, we do not have a lot of feedback on any such problem.
The top to Ortho Weed B Gon Weed Killer For Lawns Ready-To-Spray 2 is not designed to be taken off the original container.