I am in the process of starting a residential cleaning business. What are some of the best cleaning chemicals one can use for cleaning- windows, wooden floors, bath tub, inside refrigerator, dish washer, champo carpet, kitchen vent, and all other cleaning stuff required?

Some of the best cleaning supplies are still the old fashioned ones. You can spend a great deal of money on a cleaning product for every separate need and that is not entirely necessary. Here are a few links to some natural, made from home ingredients, products:

Fact Sheet: Safe Substitutes at Home: Non-toxic Household Products

Natural Cleaning Products You Have In Your Kitchen- 3 Natural Cleaning Products That Will Clean Your Entire Home

Switch to Natural Cleaning Products

Happy cleaning!

Hi Edo,
A great place to visit in March (if you're UK based) is the Cleaning Show at the NEC. Use this link for details. It's a free 3 day event for anyone in the cleaning industry. There'll be suppliers and seminars, companies show casing new chemicals/gadgets etc. (there's also usually a lot of freebies/samples to be had too!)

The Cleaning Show - Welcome to The Cleaning Show 2007

Well worth a visit if you can!