First things first, never place any type of fats, oils, grease in a food waste disposer, or any household drain for that matter. Those materials collect inside the plumbing pipes and are usually the cause of many plumbing issues.
Here’s a handy link from WaterCare on the best way to get ride of fats, oils and grease: Click Here.
Step One:
Run a steady stream of cool water into the sink before turning on the food waste disposer.
Step Two:
Before placing any food waste into the disposal, turn your food waste disposer on.
Step Three:
Gradually feed food waste into the disposer, avoid putting large amounts of food waste all at once as this may slow the grinding process.
Step Four:
Once the food waste has been broken down, turn the disposer off.
Step Five:
Let water run for a few seconds to flush the drain pipe then turn tap off.