I recently purchased a house, and it came with a gas oven. I've never owned or used a gas oven before, and the oven takes an extremely long time to preheat (like hours). I replaced the door gasket after reading up a bit online about common problems, but it still seems to heat very slowly.
What are my next steps? It does heat, so it seems like it's getting gas and all, and I'm planning to take the front off and give it a thorough cleaning, but I'm curious if there are any other "first look" steps I can take that might help before calling a specialist.