With less than 60 taps, I get a little more time to 'fool around' with this stuff - I had 3 or 4 trees on buckets and 6 on tubing that ran well up until Monday, then really slacked off, no where near what they were doing. I pulled the taps & redrilled in the same holes, and got a lot of mushy goo out on the drill bit. The ones I did all took off running again. I tapped early Feb., so I'd guess some are starting to seal off. The bucket trees were no surprise, they usually stop first on me. The tubing ones though, don't let air back in, and usually mine run right up to the end. Frost coming tonight, we'll see -