I noticed some of your listings don't mention the material used. I think your price points are fine for high-end yarn (especially a good quality wool), but if the material used is an acrylic, I think it's a bit high. Many shoppers on etsy are particular about the materials used for crochet and knit items, so I'd be very concise with what was used. (i.e. 100% Merino wool, %50 merino and 50% cotton, 75%Baby Alpaca and 25%Bamboo, etc.) You may find being more descriptive with your materials helps tremendously.
I also agree that telling more of a story is a good idea. If your pricing is where it needs to be, you definitely need to find ways to market to the people who would be your customers. Don't lower the price simply because you aren't getting sales. Keep the price and get your products out there in front of the right people. Also, remove the bit about your hand-sewn labels being easy to remove. The label is a piece of the garmet. You WANT people to know that they have your product. Be proud of it. Make them feel like it's important to have your label. Have them show it off to their friends! :)
One other side note, while I love that you're contributing to a cause I personally care strongly about, I think putting so much info in the product listing about it detracts from your product. Are you selling a product or an organization? Your product should be able to stand on it's own two feet, and having so much info about the organization you support distracts from the item you're trying to sell. I think it may also be in violation of Etsy's Terms of Service, but I could be wrong. I know at one point, the handbook stated some pretty strict guidelines about advertising charity contributions, but I haven't read the handbook for awhile, so I'd have to refresh my own memory. :) I think it's great to let people know about the organization you're donating to, I'd just put more info on your about page and less on your product listing so that your products can shine.
I hope this helps! :)