If you want your kitchen plumbing to run smoothly, taking good care of your garbage disposal is essential. When used correctly, it’s a handy tool that can help break down food waste and keep your sink fresh and functional. When used incorrectly, it can quickly become one of the biggest causes of blockages, bad odours, and costly repairs.
To help you avoid the most common mistakes when using a garbage disposal, our plumbing engineers have put together a clear and practical guide covering the key do’s and don’ts every homeowner should know.
These expert tips will help you keep your disposal running efficiently, prevent unnecessary breakdowns, and extend the lifespan of the unit.
Why Proper Garbage Disposal Care Matters
Garbage disposals are designed to grind down small quantities of soft, food-based waste. When used responsibly, they reduce household odours, minimise kitchen mess, and help prevent food scraps from blocking your pipes.
However, many blockages and mechanical issues happen because homeowners unknowingly put the wrong items down the disposal or use it in a way that causes unnecessary wear and tear.
A well-maintained garbage disposal not only keeps your sink running smoothly but also helps prevent problems such as:
- Clogged drains
- Slow-draining sinks
- Unpleasant smells
- Motor breakdown
- Blade damage
- Leaks under the sink
If you are already dealing with a kitchen sink that drains slower than usual, take a look at our helpful guide on how to fix a slow draining sink.
Do’s: How to Use Your Garbage Disposal Correctly
Do run cold water before, during, and after use
Cold water helps solidify grease and oils, allowing the disposal to break them down more easily before they reach your pipes. Running water throughout the process also helps flush food particles out of the unit properly.
Do feed waste into the disposal gradually
Large quantities of food dumped in at once can overload the motor and cause jams. Feeding scraps slowly gives the blades time to break everything down safely.
Do regularly grind small pieces of citrus
Lemon and lime peels help freshen the unit naturally and keep the inside clean. Grinding small amounts of citrus peel can also help reduce unpleasant odours.
Do keep your disposal clean
Food residue can accumulate around the blades and inside the chamber. To keep it clean, consider:
- Flushing with cold water
- Using a mild, non-corrosive cleaner
- Grinding a handful of ice cubes to remove built-up debris
Do check for leaks and unusual noises
Early detection can save you a lot of trouble. Strange noises often mean something has fallen inside the disposal, while leaks may indicate worn-out seals or loose connections.
Don’ts: What You Should Never Put in a Garbage Disposal
Don’t pour grease, oil, or fat into the disposal
Cooking fats harden as they cool, which can coat the blades and build up in your drains. Over time, this will lead to major blockages and an unpleasant smell.
Don’t put fibrous or stringy foods down the disposal
Certain food items can wrap around the blades and cause jams. A few such examples include:
- Celery
- Sweetcorn husks
- Onion skins
- Asparagus
- Pumpkin fibres
Don’t grind eggshells or coffee grounds
Despite the myths, both are common causes of blockages. Eggshell membranes stick to the unit’s components, while coffee grounds clump together in pipes and create thick sludge.
Don’t put bones, pits, or hard food scraps inside
Garbage disposals are not designed to grind extremely hard materials, such as bones, fruit stones, and seeds. All of these can dull the blades or damage the motor.
Don’t use harsh chemical drain cleaners
Chemical cleaners can corrode the disposal and damage your pipes. If you need to clear a clog, it’s safer to call a professional plumber.
Signs Your Garbage Disposal Needs Attention
Even if you follow all the best practices, garbage disposals can still wear down over time. Some of the most common indicators that your disposal may need repair or replacement include:
- A persistent burning smell
- Water leaking from the bottom or sides of the unit
- Loud grinding noises
- Frequent jams
- Slow drainage despite cleaning
- The motor failing to switch on
6 Expert Tips to Keep Your Garbage Disposal in Top Condition
Here are our top practical recommendations to maintain a smooth-running system:
Tip 1: Use cold water instead of hot water
Cold water prevents fats from melting and spreading through your drain system.
Tip 2: Break large items into smaller pieces
Even soft foods can strain the motor if they’re too large.
Tip 3: Clean the rubber splash guard
Food often gets trapped under the guard, leading to odours. A gentle scrub with warm water and washing-up liquid works well.
Tip 4: Let the disposal run for an extra 10 seconds
This ensures all food particles are fully flushed out of the system.
Tip 5: Avoid leaving food inside the disposal
Always run the unit immediately. Letting scraps sit inside will create smells and attract bacteria.
Tip 6: Know when to call a professional
If your disposal keeps jamming or the sink continues to drain slowly, the issue might be in your pipes, not the appliance.
The Bottom Line
Taking proper care of your garbage disposal is one of the simplest ways to prevent blockages, unpleasant smells, and unexpected plumbing issues. By following the essential do’s and don’ts outlined above, you can keep your disposal running smoothly, extend its lifespan, and avoid unnecessary repair costs.
If you do run into problems, whether it’s a blockage, slow drainage, leaking pipes, or a faulty disposal unit, look for reliable plumbing experts you can trust to help resolve the issue quickly and professionally.
