Contrary to the belief that bleach kills everything.... coccidia is not killed by bleach or Lysol for that matter. The only cleaner/disinfectant that KILLS coccidia is ammonia mixed at a minimum of 10 % solution. A little stronger is better. I mix it at 1 to 4 ratio... One part ammonia 4 parts water. Be very careful not to mix ammonia with products containing bleach as the results can be deadly to u as well as the pups. Wait several hours after cleaning with one before u clean with the other. How I ensure my carriers, litter boxes, etc. Are well cleaned and rid of coccidia along with any other "funk" I clean items when they are done being used with bleach in the morning and ammonia at night. Rotating items so they aren't used for atleast 4 hours after being cleaned.