Hi w102acd,
Check this thread, where I gave some info of how I cleaned my HSR 35's.
http://www.cnczone.com/forums/showthread.php?t=67361
You can also send me a PM, and I can give more info about this.
Check if the end seals are sticky like chewing gum (caused by agressive coolant and/or way oil). If they are not OK and do not scrape the rails properly, they will let dirt enter the ball races which are bad news.
If you will buy new seals, I recommend that you buy the "SS" seal sets which include End seals, Inner Seal, and Side seals.