Why steam gets in where water does not
IP68 is tested with liquid water: a sealed phone, still, at a set depth. Seals stop liquid because water has surface tension and cannot pass through a gap smaller than a droplet. Water vapour has no droplets. It diffuses through the same microscopic gaps as air, around button seals, through speaker and microphone meshes, and along the edges of a port.
Inside the phone it meets surfaces that are cooler than the bathroom air, and it condenses back into liquid exactly where you least want it: on the camera lens, on the inside of the display, on the logic board. A shower delivers the warm, saturated air that makes this happen fastest, and it does it every single morning.
The signs it has already started
Condensation inside the camera lens is the classic one: a foggy patch in photos that clears over an hour or two as the phone warms up. A liquid detection alert when charging after a shower is the second. Speakers that sound slightly muffled or crackly first thing and clear later, and a screen that is sluggish or shows ghost touches in the bathroom, are both the same mechanism.
Each of those is reversible on its own. What is not reversible is the cumulative effect. Every condensation cycle leaves a trace of whatever was in the air, and bathroom air carries soap, shampoo and skin residue. Over months that film builds on contacts and seals, and the phone that handled steam fine for a year starts failing at it.
| Symptom | What it means | Reversible? |
|---|---|---|
| Foggy camera after a shower | Condensation on the lens | Yes, as the phone warms |
| Liquid alert when charging afterwards | Condensation in the port | Yes, dry port-down first |
| Muffled or crackly speaker in the bathroom | Moisture in the mesh | Yes, eject tone and airflow |
| Ghost touches or lag in the bathroom | Moisture on or under the glass | Usually, once dry |
| Any of the above persisting outside the bathroom | Residue or corrosion building | Not by waiting |
What to do if the phone is already showing symptoms
Get it out of the humid room and let it reach room temperature before doing anything else. Do not charge it until any liquid alert has cleared, and do not put it in the sun or on a radiator to speed things up, because heat drives moisture deeper before it drives it out.
Then treat it as a mildly wet phone. Run the eject tone with the speaker facing down to clear the mesh, leave it port-down in moving air for an hour, and check the camera once it has warmed. If the fog does not clear within a few hours or returns without another shower, moisture is trapped behind the lens and needs a technician to open the phone.
How to keep using your phone in the bathroom
The honest answer is that a phone on the sink during a shower will always take some steam, and the only complete fix is leaving it outside. Short of that, three things cut the exposure most of the way. Run the extractor fan or open a window before the shower rather than after, which keeps the room below saturation. Keep the phone as far from the shower as the room allows, ideally in a closed cabinet or a drawer. And leave a case on it, which does not stop vapour but does keep the phone slightly warmer than the air, so less condenses on it.
A sealed pouch is the one accessory that actually works, because it keeps the vapour out entirely, and a cheap one is worth having if the phone lives in the bathroom for music or a podcast. Do not rely on the IP rating for this; it was never tested against it.
Steam versus the other bathroom risks
Steam is slow damage. The fast version is the phone going into the water, which in a bathroom means the bath, the basin or the toilet, and that is a different situation with a different response. If that is what happened, this site's guide to pool, sea and toilet water covers it; the key difference is that toilet and bath water carry soap and bacteria that need a rinse and a proper clean rather than just drying.