I wouldn't worry. My humidity always spikes after I clean the vives. Just keep an eye on it and make sure it doesn't persist for too long; but with a heat lamp and in a glass tank I am surprised you're not having the opposite problem.

I would try to level out those temps just a tad though - on another note. 94F sounds a little high to me... perhaps you can drop it down about 3 or 4 degrees F.

All the best!