I really dont do it as often as i should i really dont see the point in washing them every week i use them on my face only, fair enough if your using them on different people they need to be clean all the time, i really dont look after mine but for the price of some brushes i should proberly take more care, yea i know they get full of bacteria and so on but im not obsessed with maybe my face will brake out if i have a dirty brush.? I may just have a brake out due to hormones that has nothing to do with using dirty brushes maybe i have a very relaxed attitude about it lol i dunno but yea im not that fussed. I clean them when i feel i need to, but each to their own, Their are so many reason why you need to make sure your brushes are clean they last longer your makeup will look better due to theirs no build up of oil ect ect ive read articles after articles you choose to take the advice or not. So all i do is use a brush cleaner i have the Mac one if you don't have a one baby shampoo would be fine its gentle enough. I didn't like the bottle the Mac Cleaner came in so i used a Mac fix Plus bottle with the spray so much easier!!!! I get a old towel spray the brush with the cleaner then wipe it back and forth on the towel you will see all the dirt coming off as you wipe, then all i do is put the brush under water and you will see more colour coming of , when i cant see any colour coming of i sort of like squeeze the excess water and shape them and just lay them to dry under a radiator and its as simple as that 24hrs later clean brushes.. Whats your attitude to cleaning your brushes.?