Sprinkler Head Cover Can I Clean The Commercial Fire Sprinkler Heads In My Office Building?

Can I clean the commercial fire sprinkler heads in my office building? - sprinkler head cover

I just remodeled my building. A close friend of mine re-textured ceilings, while I was on vacation. Cover the nozzles before spraying the compound of mud. Obviously, coated sprinklers. The Lord's answer to me was that in a cup of hot water and mud immediately comes to typing. Is that true?