Using a powered machine
If it’s a powered machine that you’re using, set it to the highest setting and move and start scarifying. Use the machine the same way you would a lawnmower. Go up and until the whole area has been scarified.
Using a hand-held tool
If you’re using a hand-held tool such as a rake or hand scarifier again, go up and down the lawn, slowly tearing up the thatch.
Once you’re finished, use a rake or garden vacuum to gather all of the debris.
Using a powered machine
Depending on the amount of thatch you’ve removed on your first pass, you might want to lower the scarifier setting. This time around, move at a 45-degree angle from the first pass. Since deeper moss and thatch will be looser from the first pass, they will come off easily on your second go.
Using a hand-held tool
For rake and hand scarifier users, go a bit deeper on your second pass. And same as with the powered machine move at a 45-degree angle compared to your first pass.
Remove any leftover debris and your lawn is good to go.
Passing the lawn two times is more than enough when you’re doing the scarifying in spring. However, if you’re doing it in autumn and a lot of thatch and moss has built up, you might have to pass over your lawn with the scarifier up to four times.