Another Beis Hamikdash conundrum

Yetserday's daf (Zevachim 88) states that you are not allowed to launder the bigdei kehuna. The kohanim were also not allowed to wear dirty bigdei kehuna. There is no way that a kohen can do avoda, slaughtering the animal, being mekabel the dam, carrying the parts to the mizbeiach etc. without getting dirty. This leads to the conclusion that the bigdei kehuna could only be worn once. However, the implications of this are quite difficult. They would have had to be constantly making new bigdei kehuna. We don't find any source saying that the bigdei kehuna were only worn once adn we don;t find any sources that they were constantly makiing bigdei kehuna.