Sales never worked for me, so I don't do them anymore.
Lowering your prices (for unique handmade items) just makes them look cheap and mass-produced. Or buyers think there is something wrong with them.
Often increasing your prices turns up sales!
If you value your products higher, so might your customers.
PS: had a quick look at your shop and noticed that your prices are already extremely low. My advice would be to increase them by at least 50%. Just a suggestion, because pricing your items is of course totally up to you.