oysters better or blue pill better?

just buy the nippon home ac coil  cleaner 

the roller is an important part to clean if you live in dusty area.   any ac servicing that dont clean roller by default i ban.   I've heard shit about midea but when i stayed in JB serviced apartment they use midea and it worked well. just that i think the compressor sounds crazy loud dunno why   my BTO i used brand new daikin smile series 5 ticks. thought i loved it but for some reason the roller always damn dusty and clogged. my AC filter evey mth sure dirty like fuck. every 6 mths sure need to service if not start dripping water.   then now i use old Mitsubishi starmex 3 ticks, for some reason much cleaner, AC filter like not need clean after a mth. bill also lower than daikin. not apple to apple comparison, but based on my experience, maybe next house likely Mitsubishi.

for pressure washing, this guy use plastic bag and screw driver to fill in all the gap. i see many video, no one really try to seal up the pcb area like him 8.20sec onwards after washing he also wipe dry even if using plastic bag for condenser if you put chemical you need to spray downward and explain why