- Turn off the air purifier and unplug it from the power socket.
- Turn the air purifier upside down.
- Turn the bottom cover anti-clockwise and lift it off.
- Remove the old filter.
- Take the new filter out of its packaging and remove the plastic wrap.
- Insert the new filter.
- Put the bottom cover back and turn it clockwise to lock it.
- Plug in and turn on the air purifier, then reset the filter (see next article).
Tip: Only use original PRISM+ filters to avoid damaging the device. The air purifier won't turn on unless the filter and bottom cover are fitted properly.