If the records are in a paper sleeve (paper is high on the list) they move around a bit in shipping. Paper rubbing vinyl makes a great static charge.
Try it. Take a paper record sleeve and rub a record vigorously. You won't hurt it. Pass the back of your hand over the record and you will feel your hairs stand on end.
As for what made the record sound awful after cleaning? Lord knows but I doubt it was static.
As far as discharging the record a path directly to ground is the gold standard. This is easily done with a conductive sweep arm or a carbon bristle record brush attached to ground. You can drill and tap one of these brushes and wire it to ground near your table where it is handy. This is the best way to discharge a record. All that other stuff is making a mountain out of a mole hill.
Try it. Take a paper record sleeve and rub a record vigorously. You won't hurt it. Pass the back of your hand over the record and you will feel your hairs stand on end.
As for what made the record sound awful after cleaning? Lord knows but I doubt it was static.
As far as discharging the record a path directly to ground is the gold standard. This is easily done with a conductive sweep arm or a carbon bristle record brush attached to ground. You can drill and tap one of these brushes and wire it to ground near your table where it is handy. This is the best way to discharge a record. All that other stuff is making a mountain out of a mole hill.