Review (3/5): Sprayers stopped working quickly, but were replaced by seller
I wish I had read the reviews in advance, because I have the same problem with the pump sticking in the down position. The spray opening is not clogged, and emits a generous fine spray, but the pump spring does not return. I use a very diluted essential oil mix in the bottles. I have looked for replacement sprayers, but the set is so reasonably priced it doesn't make financial sense. The bottles are pretty and well made otherwise, but not really usable for my needs.
UPDATE: 3/22/17 I contacted the seller directly. They promptly sent replacement sprayers to me. They were the wrong size so I promptly received the correct order. I haven't used them enough yet to know if they fail, but am upgrading my rating due to their prompt reply and standing behind their products.