Best offerings for Arachne?

Lately I’ve been working with Arachne and her children. I usually give them dragon’s blood incense, but sometimes I get the feeling that I should give something stronger. I once gave a fly, but that was a special circumstance as it was a small one and easy to catch (not to mention that I don’t want to be living in an environment where I’m catching flies of any size on the regular anyway). I’m also wary of giving body fluids more intense than saliva. Any suggestions? (spices, herbs, other types of incense, etc?)

Best offering is the one you ask and she tells you what she’d like.