[RiseofAsia]

Just take out filter to wash and use a damn rag to wipe away dirt can liao! Make sure water flows freely from pipe into toilet sewage pipe lah!

This type of basic cleaning still not enough.

Every month, clean the air con filter.

Every 6 months, clean the fan coils and compressor coil.

Cleaning of Fan coil.
First switch off the aircon power, remove the fan coil cover, use paint brush to wipe off the layer of dust first on the fan coil itself. Then buy this kind of air con spray at DIY shop.Wait for 30 mins for each fan coil. Then pour
water into the fan coil using a small jar until you see the fan coil is thoroughly clean.
Finally, remove the bracket which cover the water drainage pipe. Disconnect the pipe if you dont have air blower which can suck up water to remove the white jelly or water inside the water drainage pipe. Use a hand pump and pump water into the water drainage pipe to flush out the jelly. You need to tape one end which connected to the water drainage pipe. Remember to place some rags on the floor.

Cleaning of compressor fan coil
First, switch off aircon power.
Use a paint brush to clean the compressor fan coil.
It is best to do it during rainy day. You can spray water into the compressor fan coil.

Pictures as attached.
Hand pump and aircon cleaner.