“Best” depends on the insect and where it’s nesting. Start by identifying what you’re dealing with.

• Wasps & hornets: Choose a long‑range nest spray for distance or a foaming formula to blanket enclosed nests and entry points.
• Carpenter bees: Use products labeled for carpenter bees, including expanding foams for galleries. After activity stops, plug holes to discourage re-use.
• Strays around patios: General flying insect sprays can provide contact knockdown, but they don’t control a nest.
• Non-spray options: Hanging traps can reduce yellowjackets and similar pests.

Safety: Treat when activity is low, read and follow the label, and keep people and pets away. If you’ve found a honey bee colony, consider contacting a local beekeeper or licensed professional for relocation.

If speed is your priority, look for contact-kill aerosols labeled for wasps and hornets. Many offer a directional jet to help you treat from a safer distance, and foaming nest formulas can immobilize insects quickly at the entry point.

• Use timing to your advantage: Treat at dusk or early morning when activity is lower.
• Aim carefully: Target the nest opening or the insects directly, following distance guidance on the label.
• Have a retreat plan: Move away promptly after application and monitor from afar.

Results can vary with nest size and location, and multiple applications may be needed. For honey bees or large, hard‑to‑reach nests, consider contacting a professional for safe removal.

Long-term control is about prevention as much as treatment.

• Seal and repair: Close gaps in eaves, siding, and soffits. Repair and paint exposed wood to discourage carpenter bees.
• Finish the job: After carpenter bee activity stops, plug old galleries to deter reuse.
• Reduce attractants: Keep trash sealed, clean up food and sugary drinks, and cover recycling.
• Seasonal traps: Set out wasp/yellowjacket traps early in the season to reduce populations.
• Maintain regularly: Inspect structures, reapply products as directed, and address small nests early.

Avoid treating blooming plants to help protect pollinators. If you’re seeing recurring honey bee swarms, relocation by a beekeeper or licensed pro is typically the most sustainable approach.

For difficult nests, many shoppers choose foaming nest treatments labeled for wasps, hornets, or carpenter bees. Foam helps blanket the nest and reach crevices, and some formulas include residual action for continued control.

• Enclosed or high nests: A nest-labeled foam or long-range jet can improve coverage and distance.
• Ground-nesting yellowjackets: Select a product specifically labeled for ground nests and follow all precautions.
• Carpenter bee galleries: Use expanding foams designed for galleries, then seal holes after they’re inactive.

“Strongest” should always be balanced with safety and label directions. Choose products intended for your setting (indoor/outdoor), and consider non-conductive options near electrical areas if the label specifies that use.

Proper storage and disposal help keep your home safe and compliant.

• Storage: Keep cans in a cool, dry place away from heat, sparks, or open flames. Don’t store in direct sun or a hot car. Keep out of reach of children and pets.
• Use and transport: Transport upright and avoid puncturing the can. Follow the label for temperature guidance.
• Disposal: Never incinerate or crush. If empty, many communities allow recycling of aerosols—check local rules. If partially full, take to a household hazardous waste site; don’t pour contents down drains.

Always follow the product’s label and your local regulations, as requirements can vary by location.