what do you use to clean pcb

[xeclipse]

finally clean

Thanks for your support guys!Detergent did the job.
After soldering the power transistors,am yet to fix them.

 

[ontoaba]

That burned resistor place, black spot. It may conductive. Check it for conductivity and remove its burned FR(carbon remain) if needed.

 

[xeclipse]

No conductivity.