Hi, my partner fingered me possibly with some precum. is the hiv in precum dead by the time it touched me? is there a risk of hiv?

No risk, no worries: It doesn't matter whether or how long HIV can survive in pre-ejaculate fluid (or in blood or any other body fluid). Nobody ever gets HIV by fingering, hand-genital contact, or exposure to infected fluids in the environment. If you do not have acuta sex -- unprotected penis (no condom) inside vagina or rectum -- there is never any significant HIV risk. But get tested if still worried.