Welcome to the forum TorontoDave. The bro's have given plenty of good advice that I will echo.
I use HeadSlick and have never had a problem with it drying up. I think Bill summed it up; make sure you have your scalp thoroughly wet and you shouldn't have any issue. Also, you only need about a nickel or dime size dollop and it will do the trick. If you want to get more involved and make a second pass, then you may want to heed the guys suggestions about a shaving brush. I haven't gone that route yet and I'm trying to keep it simple. I have enough shaving supplies and I rotate through different razors and creams/gels.
Good luck and let us know how it goes.
