Hi Ozak,

I like what you said on "...if the filter is new, I can understand. But if been using for a while, I don't no how many million bacteria accumulate in there."

I was having the same issue until I discovered Coway Water Purifier more than a year ago then the problem get resolved. Now, I need not worry a thing since the Coway's charming cleaning lady comes to do the servicing without fail every other month. The filters get changed strictly according to their schedule and on one occasion, a faulty sensor being replaced FOC since the entire machine is under full warranty (parts & labour) for 5 years.

To me, a water filter needs constant maintenance....unlike a TV (for example) where I can still watch without any degrading quality after five years although I've not done any servicing. But when it comes to water filter, the moment there is a lapse in changing of the filter as required, the water quality will not be the same anymore.

Cheers.