Cleaning your air conditioner at home is one of the easiest ways to improve its performance and make sure it lasts as long as possible. But if you have ever stood in the cleaning aisle wondering which spray or cloth is safe to use, you are not alone.
At Melbourne Gas and Air, we speak to homeowners across Melbourne who want to look after their split systems without causing damage. This guide will walk you through the best products to clean your unit, what each one is used for, and which products you should avoid.
No complicated tools. No special skills. Just clear advice you can follow today.
Why You Should Clean Your Air Conditioner
Before we talk about products, let us cover why cleaning matters. A dirty unit will use more energy, cool less efficiently, and spread dust or odours through your home. Over time, this build up can damage parts inside the system.
Cleaning your split system regularly will help:
- Keep your power bills low
- Improve the air quality inside your home
- Prevent musty smells and airflow problems
- Extend the lifespan of the unit
- Avoid breakdowns in summer or winter when you need it most
Now let us look at the best cleaning products for different parts of the system.
The Best Products for Cleaning a Split System Air Conditioner
Microfibre cloths and soft brushes
Use for: Dusting vents and plastic surfaces
Start with the basics. A microfibre cloth is perfect for wiping the exterior and vents. It grabs dust without scratching the surface. A soft brush or an old toothbrush can help clean inside small spaces and behind the louvres.
Do not use rough sponges or steel wool. They can damage the plastic casing and scratch the unit.
Warm water and mild detergent
Use for: Cleaning washable filters
Most air conditioning filters can be cleaned with a sink full of warm water and a few drops of gentle detergent. Dishwashing liquid works well. Soak the filters for about fifteen minutes, rinse thoroughly, and let them dry fully before putting them back in.
Do not use hot water or high pressure to clean the filters. This can bend or damage the mesh.
Coil cleaner spray
Use for: Cleaning the indoor evaporator coil
This is where most of the cooling takes place, and it is also where dust, dirt, and even mould can build up. A coil cleaner spray is designed to lift dirt from the coil without damaging the metal or affecting the performance of the unit.
Look for a no rinse coil cleaner that is non corrosive and safe for home use. You simply spray it on the coil, let it foam, and let it drain naturally. There is no need to wipe or rinse.
Recommended brands in Australia include Hillmark and CRC. Always read the label before use.
Antibacterial spray made for air conditioners
Use for: Killing germs and reducing odours
An antibacterial spray made specifically for air conditioning units can help stop the spread of bacteria, mould, and bad smells. These products are sprayed inside the fan barrel or coil area after the dust has been removed.
Make sure the spray is marked safe for electronics and does not contain oils or heavy chemicals. Do not use bathroom spray, bleach, or anything too strong.
Some popular choices in Australia include San Air or SureClean.
Air conditioning cleaning kits
Use for: Complete home maintenance
If you want everything in one place, you can also buy air conditioning cleaning kits online or at hardware stores. These often include a coil spray, antibacterial treatment, cleaning brush, and instructions for use.
These kits are a great option if you are new to aircon maintenance and want to make sure you are using the right products for each step.
What You Should Never Use to Clean Your Air Conditioner
Some common household products can actually damage your air conditioning system. Avoid using the following:
- Oven cleaner or bleach
- High pressure hoses or water jets
- Surface sprays with oil or heavy perfumes
- Any spray that is not labelled safe for electronics or air conditioning use
- Steel brushes or rough scouring pads
These can lead to electrical faults, corrosion, or cracked plastic parts. If you are unsure, it is always safer to use plain water and a gentle cleaner or speak to a professional.
How Often Should You Clean Your Air Conditioner at Home
Cleaning frequency depends on how often you use your system and the conditions in your home. As a general guide:
- Clean the filters every one to two months
- Dust the vents and wipe down surfaces every month
- Use a coil cleaner every three to six months
- Book a professional service once a year
If you live in a dusty area or use your system every day, you may want to clean more regularly. You can always give us a call if you are unsure.
When Should You Call a Professional Instead
Home cleaning is great for basic maintenance, but some jobs are best left to the experts.
Call a licensed technician if:
- The unit smells bad even after cleaning
- The fan is noisy or the airflow is weak
- The system is leaking or dripping
- There is mould inside the unit
- Your power bills have suddenly spiked
At Melbourne Gas and Air, our team can carry out a full internal clean and inspection. We remove dust and grime from the fan barrel, clean out the drain lines, and make sure every part of your system is running as it should.
Final Thoughts
You do not need fancy equipment to clean your air conditioner at home. With a soft cloth, warm water, and the right spray, you can safely freshen up your split system and keep it working well all year round.
Just remember to avoid harsh chemicals, always turn off the power first, and clean filters regularly. If something looks or smells wrong, do not ignore it. A quick fix now can save you from a major repair later.
For help with cleaning, servicing, or repairs, contact Melbourne Gas and Air on 0440 130 396. We are available seven days a week across Melbourne.
