To clear the hose I needn't have gone beyond step 9. Once the hose is detached one can run a pipe cleaner down it. I was amazed how many coffee grounds were stuck way up there where there shouldn't be any!
A tip would be to use a magnetized screwdriver: I was worried that the screws would fall into the workings of the machine.
For the final step of reattaching the lid, having a second person would help or perhaps holding it between your knees might help - trying to apply pressure to the screws also made the arms/compartment want to collapse/ close so that was a bit of a challenge.
Very informative instructions and I now have a Keurig that works again!! :)