How to get rid of cockroaches in Da Nang apartment?

Nearby construction often drives large cockroaches into apartments. The most effective solution is to contact your building management company and request a professional pest control treatment for the whole building. DIY sprays like Raid only kill cockroaches already inside — they don't prevent new ones from entering.

Raid spray proved ineffective against large cockroaches that get in even through closed windows. Advion gel applied in multiple spots also gave only partial results. Sealing all entry points is the only reliable long-term fix, but with so many gaps in typical Vietnamese apartments, this is very difficult to do alone.