Didn't seem to work:
When the little bastards visited eight or nine yrs. ago the landlord sent Stanley Pest Control, which sent two people; one w/ a full-on gas mask & a hand-pumped spray tank, & an "inspector", who had to spot a live bug before authorizing spraying. So a good deal that something not requiring authorization & available at Target® worked, & I didn't have to deal w/ that other parasite, the landlord.
And I have two cans I may not need that might be used for other purposes.