I think Swanson's has pretty reputable products generally. I'm not sure but suspect a tincture might work better. You might want to comparison shop with Vitacost. I know for a fact that their Black-Walnut
tincture removes bugs as I've seen them come out in the toilet. I did not use clove, though, but homemade Colloidal Silver
to kill the eggs as it has lots of other benefits.
You really need to do electrification too, for example with a zapper. Different bugs require different kinds of "weapons".
However, do not try to do zappers & herbicides together. Wait a month on one or the other so as to prevent too much die off.