The skin of penis is very thin and delicate and if you apply aldara imiquimod then you should pull the foreskin back and gently wash it daily. Failing to do so may result in swelling, wearing away of the skin, or pain in pulling back the foreskin.
You can resort to other treatment options also like electrical cautery, surgical removal, Carbon dioxide laser treatment and electrodesiccation.
In my opinion you should talk to a cosmetologist/dermatologist about this and get these warts evaluated. It is very difficult to precisely confirm a diagnosis without examination and investigations and the answer is based on the medical information provided. For exact diagnosis, you are requested to consult your doctor. I sincerely hope that helps. Take care and please do keep me posted on how you are doing.