Every Mill has their own specific suggestions regarding care and maintenance and it is important to follow their recommendations so as to not negatively effect any warranties...

Here are some links to help:

Antrim Carpets Maintenance Resource Center

Godfrey Hirst Cleaning Guide for Wool Carpets

JMISH Care & Maintenance Information

Nourison Hospitality Cleaning and Maintenance Brochure

Signature Carpet Maintenance Manual

All Wool Carpet Care... 

Wools Of New Zealand Carpet Care