Sayyed Mohammad Al-Musawi,
Sayyed Mohammad al-Musawi is originally from Iraq and heads up the World Ahlul Bayt Islamic League in London. Other than being involved in various humanitarian projects, he frequently responds to religious questions. In the past, he has also spent significant time in India guiding the community.
You must be sure that you have completely removed the semen مني . No Najis item can be made Taahir before removing Nijasah عين النجاسة
Stickiness usually means there are some remaining of the semen on your body, unless you applied sticky material like shampoo etc.
If you become sure that you have removed and washed away the semen, then it will enough for you.