have it running and use CARB CLEANER as it's flamable and WD40 is not so you will notice a change in idle speed coz its burning the CC

little hint stu told me n it works much better than WD40

thats for vac leaks...

as for cleaning it... you want to take it off for sure... n to be honest even if you do sort it itll probably go bad again shortly after new one for you im afraid my friend (if its that that is indeed broken)