This is probably a daft question but im not great at gardening so any advice appreciated ..we have a tonne of weeds in our lawn. Last year my partner dug some out leaving big holes in the lawn and this year I tried with weedkiller . That has resulted in big dry dead patches in the lawn so neither looks good. Is there any way to get shot of the weeds and keep the lawn looking ok? And which is more effective? Weeds killer or digging up? Both?