@hesab I just want to add to the great answer provided by my colleague @erelectronics This "hot water with detergent" needs your attention. the detergent is what will short circuit your phone. You do need to take care of it first.
For now you want to stop continuing to try to charge, sync or otherwise use your phone. This potentially can make a bad situation worse. This may further damage your phone.
The next thing to do, is to clean it. Disassemble your phone using these guides [[Topic:Samsung Galaxy M51]]. Remove your main board as well as the sub-board . You must remove all EMI shields. If you do not remove those, you might as well not do anything. After you remove those, clean the boards, connectors and all with +90% (better if you use an even higher concentration like 96-99%) isopropyl alcohol. Follow [guide|5825|this guide], and even so it was written for an apple iPhone 3G, all the points are still pertinent to your phone. While you clean your board, check for any obvious damage, like burned or missing components etc. When it is properly cleaned, ***replace*** the battery. All these steps are to avoid delayed failure caused by corrosion. Best thing to do would be to clean it with an ultrasonic cleaner, but if you do not have access to one, this will at least help. Once all this is done, reassemble your phone and reevaluate. Until it is cleaned, everything will only be a guess. Even with all this, water damage has only a small chance to be fully repaired, but at least you can give it a try.
Since your phone still appears to come on, check the not-charging flowchart from Samsung
[image|3014211]
To determine where the components are, open this document [document|30334] and use the search function of your PDF reader.
BTW one of the issues on this model, is the flex cable coming from the sub-board to the main board. They somehow fail more than usual. I would consider replacing that as well.
Should you find "things" that are just weird looking etc, post an image of that with your Question. That way we can see what you see. [guide|21499]