The most efficient way to start would be to breed a male spider to an albino girl, take one of the male spiders (since it will be 100% het) from that clutch and breed it back to the albino female. Giving you 25% albino spiders 25% albinos 25% spiders het albino and 25% het albinos.
If you were to just choose to breed a het albino to a spider het albino, your chances are way reduced of getting an albino spider because your odds are
12.5% albino spider 12.5% albinos 25% spiders het albinos 25% het albinos 12.5% spiders 12.5% normals. All animals not visually displaying the albino gene would be considered 66% possible hets
Does that make sense?