Cabling a drain can be effective, but there are times when you need more. You need the power of a hurricane to decimate a clog and flush it to the municipal sewer system. When you cable a drain that has a lot of soap scum and build up the result may look good for a while but without a video inspection we’ll never know.
When we run our cable through sludge it’s kind of like punching a hole in a jar of peanut butter. The hole stays open for a while but eventually the sludge settles back and you have the same issue.