Cockroach control

I’ve had a pest guy come to my place via my landlord for German roaches. They used Dragnet, but I’ve also read that it’s a repellant. Will it work well for a (seemingly) very small roach problem. I’ve seen 6 in the span of 5 months. At this point the pest guy for the building (he’s been doing this building for years) has said there isn’t a problem in the building as a whole (it’s smaller) and seems fine using it. Will dragnet work or should I ask for a spray with a wsg, which he does have. Toronto

Dragnet is a synthetic pyrethroid often used for cockroach control that acts primarily as a contact poison. I have seen mention of it as a termite repellent, but do not know if that would hold true for cockroaches as well. As sprays of any kind seldom can reach all the little hiding places that cockroaches can utilize, baits often are used as a supplement. For a comprehensive treatment of German cockroach control, see https://tinyurl.com/2s74pc9c