so i built myself a 50 site aero cloner(about 8 years ago) and up until now i had 100% success rates. now all of a sudden every cut i put in it rots below the surface(cuts are held with black ez cloner plugs) immediedly i thought it was contaminated so i bleached it out then cleaned it with 35%h202 i did this to every surface are inside and on the outside as well. took a new batch of cuts and its doing it again. the stems literally are turning grey and have a slimy film on them. i wish i had pics... the resevoir is aerated with air pumps andair stones plus the mister. the only thing i can think is causing this is after years of use the actual ez cloner discs have gotten fungi (damping off?) inbedded in them and it transfers it to the clone. anyone have this experience or anytips on sterilizing everything would be cool. does anyone know the dillution rate % wise for adding h202 to the rez to ensure a sterile (or at least sanitary) environment. thanks!