Once the old leaves have dried up I take my time to remove them. Even though several layers of old leaves look nice and natural, in cultivation those layers can lead to problems for instance providing hiding places for bugs you can't reach that easily if needed.
There are not many plants with rests of old leaves left by now.C055 olivacea v. olivacea
lesliei 'Fred's Redhead' x C006A
C053 hookeri v. marginata