Unless you have solved that problem, using Vanish Oxi Action clears them right off the lawn! I used to have the same issues... glaring at me whenever I tried gathering wood for the fire, or jumping on my back when Im lying passed out from drinking in the garden. Now I am free of them and can enjoy comatosing on the grass without worry D:
I like this too. At first I thought it was done on scratch board, but clearly it's not and clearly that would have been a poor choice. In other words, don't listen to me.