wat my mother do is use a mysterious spring like metal thingy..
around 1-2m metal spring with hook on the side.. then she poke poke
the thingy into the pipe and pull out
then got thing flow out together with the spring, the thing is
like mysterious giant black mucus with a smell smellier than
gabbage...
keep doing this for very long until the mysterious mucus start
to flow out very little.. or until u are happy then u can
stop..
well it has been few years since my mother do it.. she say only
do it like once every few years.. so maybe some details i may leave
out..
note: the mysterious giant black mucus is oily, hard to grab,
disgusting and smelly.. be prepared to face those thingy..
