Vinegar eats up the rubber gaskets in sprayers so I always have to empty and wash them out after every use. The last pair of sprayers I found for a good price were at Tractor Supply. You might be able to replace the gasket in your current one. Most hardware stores have little bins of gaskets.

I managed to buy a Hudson trombone sprayer on eBay after the company stopped selling them but before they became so scarce you can't find a reasonable price. But a lot of my spraying that doesn't have to cover a distance is with little hand pump canisters from Best Buy and Lowe's etc., and those last from Tractor Supply. There are a lot of these rattling around in my gardening supplies and out in the greenhouse.

Going through paper and recycling or shredding since we're under another heat advisory. The yard needs mowing, to do one morning when I roll out of bed while it's cool.