Assalam Alaikum, I found dried semen on my clothes when i got up from sleep, I washed them up and offerd prayer, but when the water dried up i found some dried smudges of semen again on my clothes but at that time i had offered prayer. Is my prayer valid while i was unaware of these remaining smudges? or should i offer it again? Please answer me. I am really worried about it. Jazaka Allah.