I thought I was blessed because I never had any issues with mites or lice then a couple of years ago they came. I had no issues but then noticed my birds weren't looking too well. I thought they were molting but upon further inspection they had lice and mites. First I found them in one coop and then another. I immediately treated the birds with DE. After a couple of weeks of treating them with the DE they weren't improving and still had the pests on them. I had a little bit of sevin and it helped but sevin is no longer approved for use on animals. Then I bought some permethrin. After a couple weekly treatments with the permethrin the birds starting improving and no bugs. I continued treatment for a couple of more weeks and the birds continued to improve. I cleaned out their coops and bought the permethrin concentrate and then treated all of the coops thoroughly inside. I think if I hadn't treated them with the permethrin I might have lost some of the birds. I wish I had taken pictures but was so concentrating on them and getting rid of the bugs, I didn't. I used the poultry dust in the nest boxes. I used the 0.50% solution. I used permethrin 10. It worked. First I cleaned out the coops and I sprayed in the coops thoroughly every crack and crevice. I used poultry dust in the nest boxes. You have been lucky so far and maybe you will never have to deal with them. Good luck...P.S. I have been blessed to have never had a mite issue so I've never had to "deep clean". I just fork out all the bedding and start the process of building it up again every 6-12 weeks or so.