Yea I had a rough go at cloning to start i just over complicated things that didnt need to be now I got the hang of it and I pump out clones many to lol. Here is a pic of my diy clone machine clones about ten days later
Not that I can think of it did get a little warm like mid 80s for a couple of days. But after that 72 - 77 with 50-65 % humidity they are rock hard buds really frosty true test will be harvest time
Im a noob so with that being said. I looks you might have nutrient burn and lock out. I had the same problem I did a big flush. It seemed to help. But im so close to harvest. Have you done any flushing yet?