An early PCB cleaning plan helps produce better boards. Good PCB (printed circuit board) design practices are critical in order to deliver a board that performs as intended. When designing a PCB, there are many factors an engineer must consider. Everything from properly orienting the components on the PCB to carefully routing the signal traces to determining the best flux/paste mixture. All must be planned before any PCB prototyping or production starts. However, cleaning is a critical aspect of PCB design that is often overlooked during initial planning.