What we do here to warm it up, is to 1. hold it for quite a while, then 2, smooth it out into thinner pieces, and work it out from the top instead of trying to use a great big chunk of it at once as a larger piece, if that makes sense? A great big chunk definitely takes longer to warm up.
katmainomad - there is definitely a difference between the modelling beeswax and regular beeswax, regular beeswax needs to be melted and poured, it is very very hard, I think that the modelling beeswax has already been blended with something to increase its modability. From what I've read it has "aromatic beeswax content" so perhaps isn't 100% pure beeswax I would imagine

. HTH!