Not at all mate. Do that but use a cock ring that isnt really tight, you want constriction but not to the point that its cutting circulation off ... keep a nice pump to the penis.
Known as ADC [All day clamping] and it does help, many have reported this.
When you use the Bathmate again I would try to use little more intensity, so more suction than normal and you should notice size increase in less time than before.
Aim for the time at this higher pressure as you did when you first used Bathmate .. so example if you went 10 mins at first with light pressure and now do 20 mins than you will aim again for 10 mins at this higher pressure and work towards longer times until you need to up that intensity with the suction.
This is proggressive Penis Enlargement and wil yield good gains. Rest every 2nd or 3rd day if you wish or you find erections harder to maintain or soft erections.