The "dirty secret" to drying oil finishes is UV and a very very thin application. Thats why the traditional tung and linseed oil finishes are wiped on then back off (thinnest coat) and then allowed good exposure to sunlight (UV) until dry/hard. Then you apply the next coat. You build finish this way.
You put on a thick coat and you get a goody mess that never cures. Thats what happens with the "drop" on glass... The only thing the gooey drop on glass really shows is that you can't apply the stuff thick like you can varnish.