haha bro u mean 5k km and 30k km is it?
if 5km then u need clean it few times on the way u go to work le 

for malaysia air condition we suggest to service K&N filter every 15-20k km usage or every half year which ever come first.
and of course using K&N cleaning kit only 

now best price for cleaner is RM65
but i canot guarantee tat the price wont go up in short term
coz the fuel price very not stable
our cost of stock shipping from K&N US keep increasing