If lime is regularly applied without testing then you’ll end up with alkaline soil which can be as bad as acidic soil.   Considering that doing pH test is about as difficult as making a sandwich, I can’t imagine why someone wouldn’t just do it.  More on how to do a pH test here:  https://blog.timesunion.com/gardening/the-first-step-in-lawn-care/7318/

There are a couple of products you can spray on the lawn to kill creeping Charlie and clover but this shouldn’t be done when to soil is dry or the temperature are above 80°. At this point, this should be put off until September when the soil is moist and temperatures lower.

Here’s a couple of links to products that will work:

http://www.bonide.com/products/weed-control/view/061/chickweed-clover-and-oxalis-killer-conc

http://www.bonide.com/products/weed-control/view/321/weed-beater-fe-rtu