I love these sprayers.  I have used these for over a year now and not one has clogged up or failed on me yet. I do make sure to clean them out with hot soapy water if I use pesticide or herbicide since they tend to leave a greasy film. In an attempt to repel deer in my garden, I used a raw egg concoction and the sprayer handled it ok.  The concoction had marginal success with the deer which is better than anything else I've tried (I used a Ninja food processer to mix one egg with 3 cups of warm water, then strained the mixture into a sprayer.  I would have added pepper but I've tried pepper solutions before with no success)