Kitchen Electric Chimney

Mom wanted a nice way to clean her kitchen chimeny herself...she once called in a guy to do this. He did a good job...but after that we feel that the suction power is not too good...reason is...
initially we bought a chimney because we wanted perfect ventilation...without which all the steel boxes in the kitchen were catching up stickiness. when we got the chimney this condition was not there...we were very happy...but after the first cleaning by this guy...we found the stickiness back..

i tried searching throughout the internet...was unable to find a good tip..

finally found one at yahoo india answers. yet to try it and check if it works......

STEP 1: Turn off the power to the fan at the fuse box.
STEP 2: Remove the cover and soak it in hot water with dishwashing liquid. You can use an old toothbrush to scrub the hard-to-reach places.
STEP 3: Unplug the fan unit and pull it out. Set it on some newspaper or cardboard.
STEP 4: Wipe the fan unit down with dry paper towels. When you get the dust cleared away, you may need to spray some window cleaner on a soft cloth and wipe the blades down.
STEP 5: Vacuum out the enclosure with a vacuum crevice tool, then wipe it clean with a dry cloth.
STEP 6: Put the unit back together and replace the cover.

Tips & Warnings
Some fan units can't be removed. If this is the case with yours, simply clean the filters by soaking them in hot, soapy water.
Don't use abrasive scouring powders to clean the fan's parts.
Never spray liquid into the fan itself or onto electrical parts.