DESONIDE OINTMENT, 0.05% = This is the medicine that my dermatologist told me, to apply twice a day to my scalp and to my face. Question: do I have to first, take a shower [to open - up my pores] then I can apply this ointment? Thus bathe twice a day....Or can I just bath regularly, and just apply this ointment twice daily as instructed by my doctor, to control my moderate level of psoriasis?