I feed ours OPHW with fruits and veggies. We have some that are average weight and some that are bigger.
85 to 95 grams seems like they are on the small size, but that is not bad.
We have gotten several rehomed gliders over the years, we switch them to the OHPW diet and they usually take a LONG time to switch over to eating F&V, but love the OHPW. also, with critterlove I think it is 1 tablespoon per glider, with OHPW it is 1 Tablespoon for 2 gliders. so if you are giving them to much OHPW they could be filling up on that.
It took some of ours up to 2 months to start eating the F&V. they go for corn first, then eat lots of the peas, then the green beans. the fruits are not eaten as much, I do see them take some out and eat it, but I usually throw out alot of uneaten fruits.