you use 0.1% sds in the transfer buffer?
the literature recommends to not exceed 0.05% sds in the transfer buffer, the methanol (or ethanol, in your case) will not be able to remove enough sds to ensure good capture by the membrane.
but, if it works for you then why change?
Well, that recommendations comes from the fact that everything will be soaked in SDS-Methanol containing buffer but in this case the methanol containing layer doesn't have SDS(of course it will flow in during transfer).
I think that the semidry transfer system also uses 0,1% on one side (I may be wrong) I even read of some very efficient transfer with up to 0,5% SDS.