How to Clean and Maintain Your Underwater Camera | After-Dive Care

Cleaning your underwater camera starts with a fresh-water rinse and button flush within minutes of every dive — this single step prevents salt damage better than any deep clean later.

A single saltwater dive leaves microscopic crystals inside every button, hinge, and seal gap. If those crystals dry and sit for hours, they turn into grit that grinds O-rings and corrodes battery contacts. Learning how to clean and maintain your underwater camera properly starts with a simple rule: fresh water hits it first, and gear comes apart later. If you are choosing your first underwater camera on a budget, our roundup of budget underwater cameras built for saltwater breaks down which models offer the best seal quality for the price.

Why Saltwater Destroys Cameras Fast

Saltwater conducts electricity and forms abrasive crystals as it dries. Those crystals chew into rubber seals and creep into crevices that a delayed rinse cannot reach. The UWCameraStore maintenance guide says the golden window is the first 10 minutes after surfacing. Even a quick dunk in fresh water buys time for a proper wash later.

Temperature limits matter too. OM Systems states that underwater cameras should never sit above 40°C (104°F) or below -10°C (14°F) for extended periods. Heat softens gaskets; cold makes them brittle. A rinsed camera stored in a shaded, room-temperature spot keeps seals healthy longer.

Underwater Camera Maintenance: The After-Dive Sequence That Saves Your Gear

Two types of underwater cameras exist — sealed waterproof bodies like the GoPro HERO 12 and OM Systems TG-7, and housed cameras that sit inside a dedicated waterproof case. Each needs a slightly different cleaning flow, but the sequence is the same: rinse fast, soak thoroughly, dry completely, and inspect every seal before the next dive.

How to Rinse a Waterproof Camera (GoPro, OM System TG)

Sealed waterproof cameras need a shorter routine than housed rigs, but every step counts.

Start with cold fresh water — never warm or hot, which can soften gaskets. Immerse the camera completely, lens pointing down. For the TG series, OM Systems recommends a 10-minute soak while pressing the power button repeatedly to open and close the retractable lens cover and flush trapped salt. For GoPro HERO 11 and 12 models, the official GoPro cleaning guide advises rinsing under gently running water while pressing every button 5–10 times. The buttons feel clean and press freely with no gritty resistance.

Dry the camera with a lint-free microfiber cloth before opening any door. Inspect the battery and USB cover for sand, hair, or debris — a single grain on a seal can break waterproofing on the next dive. OM Systems explicitly warns against chemicals, rust preventatives, and anti-fogging agents — they destroy internal waterproofing. If hard water spots form after drying, wipe with a soft cloth; never use solvents.

How to Clean a Camera Housing (OceanCam, Sea&Sea)

Housings need more hands-on care because the seals take the full pressure of the dive and are user-serviceable.

Before the dive, inspect the O-ring, the groove it sits in, and the mating surface for sand, hair, or lint. Apply a light coat of manufacturer-specific lubricant — Krytox or a flawless silicone grease — in a thin, even layer. Over-greasing attracts debris and compromises the seal.

After the dive, dunk the housing in fresh water immediately. Press every button, turn every knob and lever multiple times to flush salt from behind the seals. The Scuba Diving housing care guide recommends using an air blower behind metal buttons to prevent corrosion. Remove handles and trays for a separate clean. Soak the housing in a bathtub or large container of fresh water for 10–30 minutes, working all controls to loosen salt deposits. Dry completely before storage.

Leak test before your next dive: do a quick dunk with the camera inside and watch for bubbles. Any stream of bubbles means a seal issue — do not dive until you find and fix it. Professional service for housings is recommended every 1–2 years, per Alpha Marine Photo. Compact housings should go to a qualified technician for full O-ring replacement and pressure testing.

How Much Grease Does an O-Ring Need?

More grease does not mean a better seal. A thick layer collects sand, hair, and debris, which then creates channels for water to leak through. The UWCameraStore guide says to use a microscopic amount — just enough to make the O-ring look slightly glossy. Run your finger along the O-ring after greasing. If you feel excess, wipe it off with a lint-free cloth before installing the O-ring.

Only use manufacturer-specific lubricant. Krytox and flawless silicone grease are the standards for most housings. Generic petroleum-based greases can swell or dissolve the O-ring material, causing failure at depth.

Common Cleaning Mistakes That Flood Cameras

• Leaving gear in communal rinse tanks. Other divers drop gear on top of yours, misaligning seals or bending connections. Rinse only in a personal bucket or a dedicated station where you control the space.
• Over-greasing O-rings. More grease traps grit and creates leak paths — thin and even is the goal.
• Skipping the lens cover exercise on TG cameras. Failing to press the power button while soaking lets salt cake behind the retractable lens cover, which can stick on the next dive.
• Using solvents or anti-fog chemicals. These destroy the waterproof coating inside the camera. OM Systems and GoPro both ban them outright.
• Pouring water directly from a hose onto the camera. Immersion is the only safe method. Direct spray forces water into seals under pressure.
• Stretching O-rings during installation. A stretched O-ring does not seat evenly and will leak. Roll it into place gently — never pull it.

How to Store Your Underwater Gear Between Dives

Storage mistakes cause as many leaks as poor cleaning. After the gear is bone-dry, disassemble housings completely. Store the housing with old O-rings installed — new O-rings stored under tension will deform. Keep fresh O-rings in a zip-lock bag with a dab of grease. Leave the back door of the housing slightly open to prevent the seal from taking a permanent set.

For waterproof cameras, store the body dry at room temperature. Never leave a battery inside during long-term storage — salt moisture trapped in the compartment can corrode terminals even when the camera looks clean.

Your Post-Dive Maintenance Checklist

Before the gear goes back in the bag, run through this sequence:

1. Rinse immediately — fresh water within 10 minutes of surfacing.
2. Soak — 10 minutes for waterproof cameras, 10–30 minutes for housings, working all controls.
3. Dry — microfiber cloth, air blower behind buttons.
4. Inspect — check every seal, groove, and mating surface for debris.
5. Disassemble — remove handles, trays, batteries.
6. Store — old O-rings in the housing, new ones bagged, back door open.
7. Schedule service — annual for waterproof bodies, every 1–2 years for housings.

Skip any one step and salt will find the gap. Follow all seven, and your underwater camera will outlast your dive log.