How do I remove blue painters tape from outdoor vinyl siding?

The tape has been stuck on the siding for 3 years and it is in inconspicuous areas so I can try different things.

How do I get duct tape off vinyl siding,the sticky stuff?

I PUT UP PLASTIC OVER THE OUTSIDE WINDOWS,USING DUCT TAPE. DUCT TAPE LEFT STICKY STUFF ON THE VINYL SIDING.

How can I tape something on to vinyl siding and expect it to stay?

We have made our porch into a room. Leaving the vinyl siding (for now) on the wall. I want to hang a big poster on it to cover the siding. What will stick. It is not a framed poster. I just want to tape it on (so to speak).