Bought this product recently as one of my power amp "died" and once I opened it I was greeted with a huge amount of dust.This product removed 99% of it from the circuit boards caps wires and fuses. Once was cleaned I was able to spot the issue with the amp: one of it's internal fuses was blown once replaced it was back on duty. After that I opened all my audio amps and cleaned them with this product also cleaned my desktop PC. This product is or it's peers a must IMO for PV and electronics cleaning maintenance The only reason it's not 5 star as the pressure falls quiet a bit after a few longer 15sec bursts. When that happens one must let it rest a for awhile to have the pressure to return. I don't know if this is brands specific of this is how these products work. They also get very cold to the touch but I assume this is normal. Other than that I think they are very effective.