Ditto !
I do the same.
I only shave trice a week, so always remove the blade from my DE.
I clean my DE each shave anyway, so have to remove the blade anyway.....
Even though Derby, Feather, Wilkinson and what ever stainless blade you might be using, supposedly will not rust, they WILL rust at some point if you leave them wet in the DE razor.
At least they might rust if you only shave 1-2 a week. I feel better, if I remove the blade after my shave.