What is the recommended way to remove excess flux after soldering?

Removing excess flux after soldering is crucial for ensuring the longevity and functionality of the joint. The recommended method is rinsing with water, as it effectively helps dissolve and wash away the flux residues that may be corrosive or conductive over time. Flux can leave behind residues that might interfere with the electrical or thermal properties of the joint, so rinsing with water ensures a clean surface.

Using a dry cloth might seem practical, but it typically does not adequately remove the flux residues, especially if they have adhered strongly to the surface. Relying solely on heat may be counterproductive, as it can sometimes cause the flux to harden, making it more difficult to remove. Additionally, the idea that excess flux should not be removed is not accurate since leaving it in place can lead to potential issues with corrosion or electrical shorts.

Therefore, rinsing with water remains the most effective method for Flux removal, promoting a clean and safe soldered joint.