advice please humidity for mixed aged eggs during lockdown or raising humidity in little giant 9300

[orpingcrazy]

[This has probably been answered a100 times the few I saw hasn't answered clearly.
There are 2 eggs on day 18 1 on day 16 and 3 on day 7 in a brinsea mini 7 egg bator because hatching eggs from only 1 hen. Guessing its not good for at least the youngest 3 for there to be 70% for almost a week. I have a little giant 9300 still air that has been on for a few hours and is keeping about 54% humidity to the installed hydrometer and about 63% on an nonexpensive reader also put in. With that much space for only 3 eggs is it possible to get humidity up or is it okay to keep all eggs together and drop humidity for a few day before last eggs hatch. Thanks for any help. Wouldn't have been an issue if propped humidity could be dependabley reached in the little giant.

 

[orpingcrazy]

Added 4 sponges to the little giant and filled all water trays and the hydrometer on the incubated says 60% and the cheep one says 68% and the temp installed says 98.9 when it's set to 99.5 and the other says 97.3 which had the same temp as the brinsea was set to. Don't trust this enough to switch eggs but is the high humidity going to effect the others.

 

[orpingcrazy]

No replies yet no problem though the first and second set hatched without a humidity problem. The third set is due to hatch in a couple days being in a dry incubator since the others were done with their hatch. If anyone happens to read this and has any suggestions on how to use the little giant 9300 for maintaining temperature and humidity successfully please post thanks.