Imagine yourself as a monkey & its a football...
...but real slowly...srsly I think maybe one of those screwdriver type "hooks" for getting rubber hoses off radiators work good if you can catch the threads perfect, so as not to effect them, but it may help either removal or re-installing...I 4get...haven't done it for long time...need to someday...I will await more replies here with any info better than I've provided...possibly a powder or can't imagine WD-40 or some type of spray would hurt...obvsly surgically clean it all b4 re-assembly...