First, AFT's are nocturnal geckos meaning they are active at night and hide/sleep during the day. This doesn't mean they won't come out during the day but its not really natural for them. CB AFT's will have a tendacy to be seen during the day more than WC. Is your humid hide over the heat source? If so you might try taking the top off and putting them in there and then put it back in place. Sometimes that will help them discover it. Also check your temps to be sure there neither to hot or to cold on the warm end.
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My posts and replies are my experiences only
1.2.15 Tokays
1.4.10 Leos(13 albino)
1.2.0 AFT's(amel male)
0.2.0 Stenodactylus Petrii(Dune Geckos)