When I first started making wine, I didn't sanitize the tree. Nobody had suggested it. One day I noticed the same thing that saramc had. The tree's finger touch inside the bottle where I plan to store my wine. These days I give the tree a quick spray from my sanitizer sprayer before use.
Cleaning the tree!! For me that's a big ouch. I didn't think to do that in the beginning either. I guess I also didn't drain all the drippings out of it either. As one day I noticed some growths or discolourations in the base. Really tough to clean out.
the procrastinating wine maker in the Niagara Region of Ontario Canada
"Visual signs of fermentation are highly overrated"