Once you get the temp set, make sure it is stable for several hours. I have found that the bast way to make sure your hatch goes well in an LG is to keep the 'bator in a stable temp environment. Get the inside temperature where it needs to be - then don't touch the dial.
Messing with the...
At the level where the top of the eggs will be, it needs to be 102 degrees.
98 is way too low. The humidity is a bit high. I keep it at about 40-45% for the 1st 18 days.
Mainly, though, you need to get that temp up.
Forced air means it has a fan. Temp for forced air is 99.5
Still air has no fan. Temp at top level of eggs is 102 degrees.
Set the temp on the 'bator a couple days before you put the eggs in.