I follow the annual program from Scott's on my lawn 4 times per year. This year I have an unusual higher amount of dandelions probably because the weather has been warmer earlier this year. What's the best way to get rid of them? Last year I tried weed b gone that doesn't kill grass, but I still ended up having yellow spots all over a month later? Should I buy the 'Weed Hound'' dandelion digger?