Major problem though and I've had this happen now twice: the cork!!!
I've had one bottle open from which I had a dram every now and then and after 6 months I had to throw it away as the cork took over and it became undrinkable. Happend exactly the same way with the second bottle.
So if you drink this nice whisky, do yourselves a favor and transfer it into a decanter or into another empty bottle or replace the cork straight from the start as you risk finding yourselves with cork whisky