Vacuum cleaner filters, like car filters, will lose it effectiveness with usage and needs to be replaced regularly.
For some reason, the Deerma DX900/DX920 dust cup sponge filter is sold at an exorbitant price. The worse part, they are not even a Deerma original. The cheapest that I could find is from one seller from China at Shopee Malaysia. The price is at RM12.40 a piece, if I were to buy 1 unit, but at RM20.00 a piece if I were to buy 2 or more. One strange pricing scheme here. Why?
Not wanting to pay such an outrageous price, this is what I did in the end - I made them myself.
It took me about 2 weeks before making one that I find acceptable. Functionally, it works and it traps minute dust particles. Without blowing my own trumpet, I think they are as good as the one that came with the Deerma vacuum. Not perfect in my cutting (if only I know how to make those stamping die cutters) but they fit snugly into the dust cup. After using them a couple of times over the past month, I do find them quite usable. As far as I can tell, I don't think any dust particles did slip through the filter, either through it or via its side.
The cost per piece of my DIY vacuum dust cup sponge filter - about 50 sens (15 US cents) per piece.
