Now it started to show real joint cracks on the front and back. I think these joints are the same ones as those which had been filled previously. The longest joint crack is in the front; it goes from the bottom of the block all the way up to the top, and I can see the corresponding crack on the top, which was not there on the day of delivery.
What could I do to prevent further cracks? The house has been really dry lately (16%-24% humidity), due to the cold weather and central heating. I have lowered the thermostat to 60F most of the time, and put a freestanding humidifier next to the block. The humidifier has been running non-stop for two days, but it's unable to increase the humidity by much.
Should I fill the existing cracks immediately with wood filler or beeswax? The care instruction I received from MMB says to use wood filler, but the online resources suggest beeswax. If I use wood filler, what kind should I use? I assume it should be a food-grade filler? Also, some of the Emmet’s Elixir Butcher Block Oil that I applied probably has got into the cracks. Do I need to clean the oil out of cracks before applying the filler?
I would highly appreciate any suggestions. Thank you very much!
Edit to add:
Attached is the care instruction I got from MMB.
Edited by ILoveCookie - 1/28/14 at 8:44am