To be honest, no matter which electrical cleaner you choose, which should at least satisfy these four requirements:
1.Be safety and environmental protection(No CFC & HCFC);
2.No corrosion to plastics and rubber and quick-drying;
3.Be able to remove dust, greasy dirt, flux, moisture, static electricity, metallic powder, etc;
4.Dissolving and cleaning oxides and other staff between conductive contacts in order to prevent bad contact.