Yep, did all that. Got shit results anyway lol
My two biggest suggestions are...
1) don't think about them. When I was having issues it was when I was opening the dome every day, checking the bottoms for roots, and remisting. For example, I once got busy with a big trim and replant, forgetting about the clones for ~week, and come back to roots.
2) temperature in the room. My veg area was always hovering around 19-21*c. Then I moved the cloning area inside and setup a small heater to keep the are slightly warmer than room temp, like 23-24c. I noticed my 80% result going to 99%.
Now if you want the break down of the exact method here is a
link.
Follow it to a t and you'll get results. I do have a strain that doesn't show roots for 10 days, I've got one that has roots in 4.
For the record, Im not super sterile, I don't use razor blades, I don't double dunk in cloning gel and powder)
I take 6" cuts (just fit below the clear dome lid) with my trimming scissors. I try to get a node near the bottom of the 6" that I can cut off, if I don't have a node, I'll lightly scrape the stem before I place into cloning powder (unless I'm doing multiple plants at once, then I put into solo cups with water and then I bulk label, clone powder and place at one time), then into oasis cubes, no ph'ing.
Follow that
link for the rest and you'll get the results.