Question about egg and my incubator.

Hi!

My girlfriend and i are expecting our very first clutch of ball python eggs.
We bought an Exo Terro incubator. I've noticed that the temperature fluctuates a little.
If i set it to 88, it fluctuates between 86,5 and 89,5.

Will that be a problem?

You should be ok, I really don't like the 3* swing though, it's probably an on off thermostat.

You should be ok but I would def get a small digi thermometer and place the probe inside the egg tub so you get the actual temp inside the egg box, unless you have a temp gun.