The bright yellow uniforms cleaners working for both ISS and Interserve have to wear are causing cleaners serious problems, particularly at above-ground stations where they're making them highly attractive to midges and mosquitoes.
Union cleaners at ISS pushed for a colour change, and got management to agree to revert to the old blue uniform. But despite the apparent agreement, the change has still not taken place, leaving cleaners in the unpopular "canary yellows" at the worst possible time of year.
Uniforms need to be practical, protective, and comfortable. They should not make workers a movable feast for biting beasties.