Mites and lice? How do I know if I have to reapply Elector PSP?

[i-love-my-honey]

I treated my flock about 3 months ago with elector PSP for what I thought were mites. I cleaned out the coop and thoroughly sprayed it also. I have not seen or felt any little critter's since then.

I just examined one of my girls. She has had ascites for years. She had some poop on her feathers under her vent. Unfortunately when I cleaned it the first time I saw some debris, but I did not have my glasses on, so I now think it may have been lice nits. I
trimmed the feathers at the time as well.

I just took some fluid off my girl and (with my glasses on) saw what looks like nit eggs. If if I treated with Elector PSP, and the pests are truly gone, do I need to remove all the nit egg residue as well? Do I need to reapply Elecor PSP??

 

[Yardmom]

I don't know, but maybe @Shadrach or @007Sean might know.

 

[dirtbagchickens]

what is a nit egg?

 

[Eggcessive]

what is a nit egg?

Lice eggs. You can see some pictures of them here:
https://the-chicken-chick.com/poultry-lice-and-mites-identification/