Sparks will plug into the socket?  Inferior socket is not available.
For safety to save electricity, many electrical appliances when not suggest remove the plug, but every time when the plug is always sparks, let the people tremble with fear. What reason is this? Mainly because of bad socket in order to save costs without using silver contact process.
Every pie and artisan socket all use silver contact process, pull out the insert will not produce a spark that repeatedly, safe and reliable.