A moisture warning in the charging port means the phone has detected liquid or excessive moisture around the USB or Lightning connector.
When that happens, wired charging may stop temporarily to protect the port from corrosion or electrical damage.
The safest response is simple:
- Disconnect the charging cable.
- Let the port dry completely.
- Do not use heat, rice, compressed air, or sharp objects.
- Try wired charging again only after the port is dry.
- If the warning remains when the port is clearly dry, troubleshoot the phone or cable rather than forcing charging.
First, Disconnect the Charger
Unplug the cable from the phone immediately.
Do not keep reconnecting it to see whether charging starts.
Charging through a wet port can damage the connector pins and lead to corrosion.
Apple says liquid detection disables charging and accessory connections until the connector, cable ends, and accessory are dry. Samsung uses a similar protection system on supported Galaxy devices.
Let the Port Dry Naturally
Hold the phone with the charging port facing downward.
Gently tap or shake the phone to help excess liquid leave the port.
Then place the phone in a dry, well-ventilated area.
A fan blowing cool air toward the port can help.
Do not use:
- a hair dryer;
- a heater;
- an oven;
- direct high heat;
- compressed air.
Apple specifically warns against external heat and compressed air.
Samsung also recommends natural drying or cool airflow.
How Long Should You Wait?
Drying time depends on how much moisture entered the port.
On iPhone, Apple recommends waiting at least 30 minutes before trying the cable again.
If the warning returns, Apple says the connector may need up to 24 hours to dry completely.
Samsung says moisture can often evaporate within a few hours, although conditions vary.
Do not rush the process.
Do Not Put the Phone in Rice
Rice is not a recommended drying method.
Small particles can enter the port and create another problem.
Apple specifically advises against putting a wet iPhone in rice.
Use normal airflow instead.
Do Not Insert Objects Into the Port
Avoid putting anything inside the charging port.
That includes:
- cotton swabs;
- tissue;
- paper towels;
- pins;
- needles;
- toothpicks;
- metal tools.
These can damage the contacts or leave material behind.
If visible debris is deeply lodged in the port, professional cleaning is safer.
Try Wireless Charging if the Phone Supports It
If the back of the phone is dry and the device supports wireless charging, you can use a compatible wireless charger while the wired port dries.
Apple says wireless charging can still be used as long as the back of the iPhone is dry.
Samsung also allows wireless charging on supported Galaxy devices while the USB port is drying.
Wireless charging does not fix the moisture warning, but it can keep the phone powered without using the wet port.
Check the Charging Cable Too
The problem may not be inside the phone.
Moisture can also be present on:
- the cable connector;
- the charger plug;
- an accessory.
Dry the cable and connector completely.
If the warning appears only with one specific cable or accessory, test another known-good cable.
Apple notes that a warning that appears consistently with one specific cable or accessory can indicate that the accessory itself is damaged.
What if the Port Is Dry but the Warning Will Not Go Away?
A persistent warning does not always mean water is still present.
Possible causes include:
- residual humidity;
- debris in the port;
- a damaged cable;
- contamination on the connector;
- a software or USB service glitch;
- corrosion or port damage.
The next step depends on the phone.
Samsung Galaxy: Clear the USB Cache
Samsung specifically recommends clearing the USB cache when the charging port is completely dry but the moisture warning remains.
On many Galaxy phones:
- Open Settings.
- Open Apps.
- Show system apps if necessary.
- Find USB Settings.
- Open Storage.
- Tap Clear cache.
Menu names can vary slightly by One UI version.
Do this only after confirming that the charging port is actually dry.
Samsung’s current support guidance still recommends this for persistent moisture warnings on dry Galaxy devices.
Restart the Phone
If the port is dry, restart the phone.
A restart can clear a temporary USB or charging-service error.
Samsung specifically recommends restarting when the port is dry but the warning remains.
Do not restart repeatedly while the phone is still obviously wet.
Check for High Humidity
The phone does not need to be dropped in water for the warning to appear.
Very humid conditions can sometimes trigger moisture detection.
Samsung notes that high humidity can cause the water-drop warning even without direct water exposure.
Move the phone to a dry, ventilated environment and let it sit before testing again.
Check for Debris
Dirt or residue in the charging port can interfere with moisture detection or cable contact.
Use a flashlight to inspect the port.
Do not scrape inside it.
If contamination is visible but cannot be removed safely from the outside, have the port cleaned professionally.
What if the Phone Got Wet With Salt Water or Another Liquid?
Salt water, soft drinks, coffee, and other liquids can leave conductive residue behind after the water evaporates.
That residue can continue to trigger charging problems.
For serious exposure, professional cleaning is safer than repeatedly trying to charge the phone.
Do not assume that a port is safe just because it looks dry.
iPhone: Avoid Emergency Override Unless Necessary
Some iPhones allow an emergency override of liquid detection.
That option exists for situations where charging is urgently needed.
It is not the normal fix.
Charging through a wet connector increases the risk of corrosion or permanent damage.
Use wireless charging instead when possible and wait for the port to dry.
Samsung: Do Not Force Charging Past the Warning
Galaxy phones intentionally block wired charging when moisture is detected.
Do not try to bypass the protection with random chargers, adapters, or repeated reconnects.
The warning is designed to prevent damage.
Wait until the port is dry, then troubleshoot only if the warning remains.
When the Warning Becomes a Hardware Problem
Service becomes more likely when:
- the warning persists for more than a day in a clearly dry environment;
- several known-good cables trigger the warning;
- the port shows corrosion;
- charging cuts in and out;
- the phone was exposed to salt water or another contaminating liquid;
- the cable no longer fits properly;
- the phone has had charging-port damage before.
At that point, the port or moisture-detection circuit may need inspection.
If the phone also refuses to charge normally even without a moisture warning, use Android Phone Not Charging for the broader charging problem.
If charging works but is unusually slow after the port dries, see Why Is My Phone Charging Slowly?.
If the phone became wet and the speaker also sounds muffled, use How to Get Water Out of a Phone Speaker.
