I am in the process of making washington merlot kit. After three weeks I got to clearing and stabilized step where the instructions said to transfer and stir for 10 minutes. I use a drill and degassing whip. The stirring did not produce any co2 bubbles . I have made a number of wine kits and always had bubbles and in some cases foam when degassing. This degassing produced nothing. Is this something to be concerned about?