For hobbyist only. Re ease of cleaning pollen take. Forgot to mention the very FIRST step is to use a good trap, a self- cleaning one. For details and photos, see my letter to the editor, "Self-cleansing Pollen Trap", American BeeJournal, May 1995, page 376. PS It's not my trap. Again, viel Glu"ck. Jack the B-man