Can I use plastic Ziploc bags instead of a dry bag?

Yes, but they are not durable. Use a heavy-duty freezer-grade bag, but ensure you squeeze all air out before sealing. Change the bag every 3-4 days as they puncture easily.

How do I know if my silica packets are still working?

Buy the 'indicator' type that changes color from orange to green when saturated. You can reactivate them by placing them in an oven at 250°F (120°C) for 2 hours.

Should I keep my gear in the hotel safe?

Only if the safe is ventilated. In many tropical hotels, the safe is a small, sealed steel box that traps humidity inside, which can actually cause mold to grow on your camera lenses.

How to protect your electronics in tropical humidity

Prevent condensation and moisture damage by using airtight dry bags and silica gel packets inside your gear cases. Always allow your electronics to acclimate to room temperature for 30 minutes after moving from a cold, air-conditioned space into the humid outdoor heat.

Seal with silica. Place at least 3-4 large silica gel packets (10g size) inside each dry bag or electronic organizer case to absorb trapped moisture.
Use double-layer protection. Put your camera or laptop inside a dedicated neoprene sleeve first, then place that sleeve inside an IP67-rated waterproof dry bag.
Acclimate before use. When entering a building from the high heat, keep your gear in its bag for 20-30 minutes. This prevents 'thermal shock' where condensation forms on cold internal components.
Remove batteries during transit. If you are storing gear for more than 24 hours, remove the batteries. High humidity can cause micro-corrosion on battery contacts if left inside the device.

Can I use plastic Ziploc bags instead of a dry bag?: Yes, but they are not durable. Use a heavy-duty freezer-grade bag, but ensure you squeeze all air out before sealing. Change the bag every 3-4 days as they puncture easily.
How do I know if my silica packets are still working?: Buy the 'indicator' type that changes color from orange to green when saturated. You can reactivate them by placing them in an oven at 250°F (120°C) for 2 hours.
Should I keep my gear in the hotel safe?: Only if the safe is ventilated. In many tropical hotels, the safe is a small, sealed steel box that traps humidity inside, which can actually cause mold to grow on your camera lenses.