Day Five or... Two

So, I've had one cup un-rinsed, and to be fair it was left where I wouldn't normally have a that needed to be rinsed.

Anyway, according to that habit forming thing, in order to form the habit it has to be 21 days without skipping - so I'm not sure if I have to start over to test this habit or if, since it was an ACCIDENT and not an intentional "I'm going to rinse this out later"... and it certainly wasn't a whole day skipped...