Note: The trick to this tip is to make sure that the water is boiling hot – I first tried this with microwaved water that sat for a minute or so before I started taping. It did not do the trick. I went back and boiled water and took it directly from stove top to weeds. I saw it working the next day – it really killed them within 2 days. Then just pull the dead weeds out and they should not grow back! It also kills the seeds that get down in the cracks.
A big thank you to our lawn guy, Mike!