A dilute bleach solution to drench the cuts and grow them out in a different clean area will probably prevent the spread. I use bleach when I do tissue culture clones, and it does exactly what you need done. Just don't drown them too long.
Sodium hypochlorite: You can also call it bleach. It is one of the most commonly used agents for surface sterilization of explants. Bleach is diluted up to 10-20% for sterilization in tissue culture processes. This gives you a solution with the final concentration of 0.5-1.0% of bleach. The time duration required to sterilize the explant varies for each type of explant. But, usually 30-40 minutes are enough to serve the purpose of sterilization.
Just think it thru, and be careful about carrying infected plant material thru your space. So for example, prepare the bleach solution in a sterile jar. Take your cuts and put in the bleach. Clean up, change gloves, change your shirt, then carry the jar to a different uninfected location to root out. Treat that clone setup with H2O2 as they root. Back to the growspace and clean clean clean.
It only takes one egg travelling with your plants or on your sleeve to start the process all over