do scent control plugs always start leaking for others?

i got a newer scent control wallflower nightlight plug for my apartment and for the 3rd time now each one after a few days of having them plugged in i’m finding the plug is leaking from the bottom and sides and even getting oil inside the light every single time. i’ve had to go back and exchange this plug for a exact new one 3 times already. does this happen for anyone else? is this just an issue with the scent control wallflowers?