Just curious, is the receptacle that you plug the adapter into old, and does the plug seem to loosely fit in the receptacle? Usually you see this if the receptacle is getting old and the contacts inside are starting to corrode and have had a bit of arcing over the years or the contact spades are a loose fit on the plug prongs.. The following site has more information. And it might not be a bad idea to have an electrician check the outlets you usually plug into. It could be arcing where the electrical wiring is attached.
Yeah the plugs are older than I am (19).
Mmm i kinda have an idea about the situation now thanks! I'm positive plugging in the power supply to a switched outlet will fix my problem. Turning off the switch first then turn it on when i've plugged it in.
Additional info: It sparks up when I plug it so i guess using a switched outlet will help
Glad to help out and using the switch to turn the outlet off then on is a great idea. That should solve the arcing problem but one day get the outlet replaced. If your plug prongs have arcing then so do the receptacle spades.