Do not deep clean it all the time but drain out the leftover substance and run it under hot water. Make sure the water goes through the stem, base, hose, bowl and other parts of the hookah.
You can get a Khalil Mamoon hookah for sale from the website of the supplier. This is the best type of hookah available now. Egypt models are in much demand the world over.
The range that is best and most purchased is between 28 to 30 inches. This height range will give a good performance as well as it is easy to handle. If you are travelling with the hookah, you can go for something much smaller so it is not too heavy to carry.