Cloning help needed

I need some help with cloning. I bought an inexpensive cloning kit a couple of years ago that is basically a plastic container with holes cut in the lid to hold the baskets and cuttings along with a clear plastic hood and an aerator. The first time I used it I got 14 successful clones out of 15 within 10 – 14 days. Next time I got about 9 then the number dwindled to only a few. The last two tries at cloning have been total failures.

I’m using the same techniques I used on the successful attempts and I have a heating pad. I think that something has changed in the cloning equipment. Maybe there’s some toxic stuff building up in the aerators? If anyone has advice or a solution I’d appreciate hearing from you.

Thanks.

tons of questions...first of all clean after every use with dish soap and then a diluted hydrogen peroxide solution. Are u using just water? I clone in cubes and presoak them in a vit B and hygrozyme solution. The hygrozyme might not apply if you are using aeroponics. Are you using and aeroponic cloner, drip, flood....if so what medium? What is the temp and humidity? Should be cool ambient temp 75's good, 95 to 100% humidity for the first 3 days....thats enough from me.