I’ve got a clothes washer that drains into a slip sink in our basement. This evening we did a normal load of towels, and later discovered that the sink had clogged up and overflowed. In the drain I found a lot of slightly rubbery, soft material that looks like this:
Any idea what it is? The machine is 20+ years old. My guess is that it’s just some scummy stuff that builds up over years and then one day the whole layer peels off and washes away. But I’m concerned that it might instead be some important part of the machine, like a seal that has broken down. Has anyone encountered something like this before?