get some all purpose house hold cleaner make sure it's orange scented, very very important. pop off the protectors, put this mix in a bearing cleaner/water bottle and shake it around gently, then wipe them all clean, replace the protector things, and get some bearing lube, i use reflex bearing lube shit is great, put them back in and you will be good to go, trumpet valve oil works just as well, although i wouldn't recommend it.
AND PRESTO you're going.