my iPhone xr have problem when i start charging it shows "Liquid detected in lightning connector" it have been week now the problem appear every day

There are some ways to fix this problem.

--Check if there is dirt on your connector or device

--Replace your old connector with a new one. Using a charger with mfi certification will be better.

--If still doesn't work, there might be something wrong with your iPhone, go to an Apple Repair Center or an Apple Authorized Service Provider to look for help