I have 3 Rhinox 1000 diffusors that I use with a D-D kit [on rotation], the problem is that after cleaning with bleach the diffusors seem to clog up after 2 days use? is this normal? After a soak in bleach they produce a lovely mist of fine bubbles but this only lasts 2 days max. Also the bubbles only appear to come from one spot on the ceramic disc? Is there a better alternative to the Rhinox? or is this the norm with ceramic disc diffusors Jake.