I believe they mean only rinse in the sterile water. Although I have never done this. I also don't boil anywhere near every day... I'm sure I'm not the best example to follow but probably not the worst either 
I wash in hot soapy water, rinse, shake off the excess water with paper towels in a plastic bowl with a lid, then I put them into the Germ Guardian sanitizer (there has been much discussion on this lately -- I believe it is safe, and does sanitize since it does meet sterilization requirements of over 160 degrees for 30 minutes) Even if it doesn't sanitize, it is hot air and they do get completely dry. The biggest issue with keeping all this stuff clean is to make sure things are dry -- however you accomplish it make sure they are dry -- psuedomonas is a water bug... it needs water to survive.
I am much happier using the Germ Guardian than boiling than I was with having cups sitting out air drying.
I still boil on occasion just for the heck of it (I've been told it helps to make sure all the medicine gets out of the small parts and helps to keep the treatment time to a minimum - it could take longer if the cup is clogged up)
Washing of the spacer is the same as the cups, but most spacers say do not boil so read the directions with that to make sure.
We keep clean nebs in a plastic stacking tray/tub sort of thing with a paper towel lining -- it covers the bottom, sides and drapes over the top -- I put that in a cupboard that is mostly used for only those (no food)
I wash in hot soapy water, rinse, shake off the excess water with paper towels in a plastic bowl with a lid, then I put them into the Germ Guardian sanitizer (there has been much discussion on this lately -- I believe it is safe, and does sanitize since it does meet sterilization requirements of over 160 degrees for 30 minutes) Even if it doesn't sanitize, it is hot air and they do get completely dry. The biggest issue with keeping all this stuff clean is to make sure things are dry -- however you accomplish it make sure they are dry -- psuedomonas is a water bug... it needs water to survive.
I am much happier using the Germ Guardian than boiling than I was with having cups sitting out air drying.
I still boil on occasion just for the heck of it (I've been told it helps to make sure all the medicine gets out of the small parts and helps to keep the treatment time to a minimum - it could take longer if the cup is clogged up)
Washing of the spacer is the same as the cups, but most spacers say do not boil so read the directions with that to make sure.
We keep clean nebs in a plastic stacking tray/tub sort of thing with a paper towel lining -- it covers the bottom, sides and drapes over the top -- I put that in a cupboard that is mostly used for only those (no food)