Drano makes a two part cleaner that foams up in the pipe to get all sides.
Tried it once. The foaming part sure worked good but I dont know if it did
anything. Regardless, you get to play with chemicals and thats always fun

Can I ask why you just don't take the trap apart and see what it looks like?
My Dad's house has cast iron drains that have corroded to 1 inch opening. No
amount of drain cleaner will fix that.

"Ken" wrote in message
...
I have a kitchen sink drain that has given me problems due to what I
believe is a grease clog. Although I do not pour grease down this drain,
I believe it is almost impossible to prevent some, due to the nature of
its use.

Although I have tried many drain opening chemicals along with a 15 foot
drain pipe wire, the most effective for the latest clog was the rubber
bladder attachment to a hose supplied with hot water. (I have an exterior
access plug for this drain, and that is where I inserted the bladder) It
DID open the drain, but I am looking for something that will remove any
additional grease remaining in the pipe. In the past I have even used the
grease eating powder recommended for septic tanks, but I am not sure it
did any good. While the drain is still open, I hope to pour something
down it to remove any grease that has not been removed from the pipe, as I
do not cherish the opportunity to again clear the pipe. Has anyone had
good results grease removal in drains??

Ken