A female with her tail wrapped for breeding. Clean off any dirt and debris with some warm soapy water and large cotton balls and rinse clean. Before entering the female, the male will probe around the perineal area with his penis until he finds the vulva. Once he enters her, his penis will drag all the dirt, debris and bacteria he encounters directly into the uterus. Most of the time this will not cause infections in the female, but it is a possibility.
Cleanliness is always preferable.
If the wool is not trimmed, get some hair clips and clip the wool up out of the way during breeding. This can easily cause enough damage to render them incapable of breeding again. This is probably not a real concern for light wool males, but is a serious concern for heavy wool males. Breed only during weather which is not too hot for the llamas. If the weather is somewhat warm and the llamas are not shorn, try to breed in the early morning or evening when it is cooler.