Heard about tubes working great. I just hold and give and if a blood is sick 90% chance it won,t bite they do not want to open mouth and anybody that has many bloods reds in particular one time or another it will dip in temp or to much humidity it happens quick. I was bitten three times and now they all like rats better lol that might help the wife and hand sainitizer they hate the smell .misted the spell check, but best advise it works great for me.