Identify the pest
Do not assume every small kitchen insect is a cockroach. A photo or specimen helps prevent ineffective treatment.
Reduce food and water
Clean grease and crumbs, fix leaks, empty garbage, store food tightly and reduce overnight water sources.
Use monitors
Sticky monitors can show where activity is concentrated and whether a treatment is reducing it.
Coordinate
Tell the property manager early. Repeated aerosol spraying in one unit can scatter activity without solving the building-level source.
Canadian rule: if a pesticide is part of the plan, use only a product registered in Canada and follow the label for the named pest and treatment location. Provincial and municipal restrictions can still apply.