Wife was complaining that one of the switches was making a scary noise. It turns out the switch has malfunctioned and causing spark noises which could lead to a burn and electrocution.
Getting an electrician in will cost a minimum of RM35/USD9, excluding parts.
Thankfully I had a sense to buy extras of these switches when renovating the home. Waited for a time when I’m home alone, turned off the mains, work with just a torch light, electric test pen and hallelujah! I changed the light switch and lived another day.