Ive tried Wet & Forget: didnt work
Janola : 1:4 mix (same as some commercial products) : didnt work (but has to some extent in the past)
Hitman (weedkiller) Ive had some partial success with that, not the best choice Im sure
Any ideas or recommendations ?
It does all die off in summer , so its really not a huge issue, I just dont like the look of it.