Grease the plunger!!! Get your money’s worth!
I like the large size for collecting higher ozone quantities but, there’s something wrong with the softer plunger end?! It sticks, really gets stuck, so stuck I threw it away!!<br /><br />Update.<br />I like the convenience and learned that coating the black material with silicon lubricant. This keeps it from drying out and sticking and I’m buying another to replace the one I threw out.
Rating: 3 stars