Problem starting my D string
In a nutshell: my D string doesn't want to start as quickly as it did a month or two ago. I get a scratch and then starts regardless to how I play it, which makes faster passages frustrating to say the least. It is particularly noticeable open or in the lower positions, and as I get up to the end of the fingerboard it isn't as much of a problem.
Some other information that might be helpful:
I changed the string and have the exact same problem, eliminating "it's a bad string".
The only wolf I have ever had on the bass is the B up the D string, it hasn't changed, and it doesn't feel/sound like a wolf.
The Schertler pickup I have clips between the strings, and I thought it might help as a "wolf eliminator" even though I'm convinced it isn't a wolf. I moved it around a bunch and nothing changed.
I have tried a different bow. I have spent a lot of time evaluating my technique. It doesn't happen on any other string in any other part of the bass, and it just started happening, so I really don't think it's a bow/technique problem.
The bridge might have been bumped and moved a small amount. It doesn't look/play like it is wildly out of place, but I know a few mm can make a difference.
Humidity? The soundpost might be tight? I noticed it for the first time and it has stayed since it has gotten colder and dryer here. I have a humidifier that keeps things in check, but even with it on it's slightly dryer than the summer/fall here. With that said, I've had the bass for about 10 years now, it has seen significantly dryer winters, and I've never had a problem with it.
What am I missing? am I looking at a trip to the shop to see if my luthier can solve the mystery?