Yes, it is permissible to use a towel after wudu (ablution), but many scholars consider it better (mustahabb) to let the water dry naturally, as the Prophet (PBUH) sometimes did not use a towel, though he sometimes did, indicating it's a matter of personal choice or comfort. Drying off removes the water, but leaving it to dry naturally is also fine and removing the water doesn't invalidate the wudu or the forgiveness of sins that happens with the last drops.
Wipe after wudu ablution
There is indeed evidence in the established and authentic Sunnah that the Messenger of Allah (saws) at times would not use a towel or sheet to wipe himself dry after taking a bath or ablution, and at times he (saws) would use a towel or sheet to wipe himself dry.
It is permissible to wipe off the water of Wudhu, but it is recommended to leave it to dry by itself. The Hadeeth narrated from the Prophet (SAWA) states: Who performs Wudhu and wipes its water will get one reward, and who performs Wudhu and does not wipe it will get thirty rewards.
Direct Touching of Private Parts
Skin-to-skin contact with one's genitals, without any barrier, is a widely acknowledged event that breaks wudu. Based on numerous Hadiths, this rule is firmly rooted in Islamic teachings.
What Breaks Wudu?
Some said that it does not invalidate wudu at all, and this is the correct view. This means that if a man kisses his wife, or touches her hand or hugs her , but he does not emit anything, then his wudu is not invalidated and it remains as it is.
Activities that invalidate wudu include urination, defecation, flatulence, deep sleep, light bleeding (depending on madhhab), menstruation, postpartum status, and sexual intercourse. Wudu is often translated as "partial ablution", as opposed to ghusl, which translates to "full ablution", where the whole body is washed.
To get your dua (supplication) accepted, focus on sincerity, perfect your etiquette (praise Allah, send blessings on the Prophet), have firm yaqeen (certainty) in His response, perform good deeds (like charity), repent for sins, and make dua at key times (like after prayers or during hardship) with humility and focus, understanding Allah responds in the best way, even if not instantly as you expect.
Tears alone do not break Wudu.
Wudu is not affected by tears or a runny nose. Silent tears or light sobs do not invalidate the prayer. Audible sounds that do not form words (e.g., sniffles, brief sobs, involuntary gasps) are excused and do not nullify Salah.
Changing clothes does not break one's wudu if the person is in a state of purity and does not do any of the things that break wudu. Men and women are the same in this regard.
The only thing that is not permissible if a person has Najasah on his clothes is prayer, even if he has not invalidated his Wudu'. Other actions such as reading the Quran etc. are not prohibited. And Allah knows best.
If you mean dirty (earth, soil) then there is no problem. If you mean dirty in the Fiqh terminology (najas) then you can't pray without a mat. You must wash your feet. You can't wipe over the shoes, unless you apply the rules of wiping over khuffain.
Summary of answer
The slight trace that results from sweat does not matter, and your prayer is valid. All you need to do is make sure that you clean yourself properly after relieving yourself, then do not worry about it anymore than you should after that, lest you fall prey to Satanic whispers.
If you perform a recommended Ghusl like Ghusl of Jum'a, then you can pray with it with out a need for Wadhu. Just shower or washing the body does not mean valid Ghusl. After you perform Ghusl or Wudhu, your state of purity ( Taharah) continues unless it is broken by wind, urine, stool, sleeping, etc.
In Islam, the raised index finger (al-musabbiḥa) symbolizes the core concept of Tawhid, the indivisible oneness of God (Allah) and the declaration of faith (Shahada), affirming there is no god but God. Muslims use this gesture during prayer (Salah) and sometimes when saying the declaration of faith, pointing to the singular nature of God, signifying faith, unity, and praise.
The Prophet Muhammad (PBUH) advised people to cry if they are unable to, then pretend to cry. This hadith teaches us that it is important for us to express our emotions in order for us to be able process them and move on with our lives.
Seven things invalidate wuḍūʾ:
Repeating Astaghfirullah 1000 times a day is a habit that every Muslim can build. It's simple, easy, and life-changing.
Forbidden prayer times
As mentioned, Muslims are banned from praying during 3 main times: sunrise, sunset, and Zawwal. The prostration of recitation (sajda al tilawa) is permissible to be offered during these times though it is disliked (tanzihan).
Indeed, uncontrollable tears is a sign that your dua is being accepted by Allah. Few days back , I shared a reel where a sheikh mentioned six basic signs that your dua is being accepted.
If there is no impurity (najas) on her private part, kissing and foreplay stuff will not be something haram. However, if there is discharge, and chances for the husband to take the discharge in his mouth, then this would be haram.
Summary of answer
Mucus and spittle do not break wudu and they are pure.
Whoever watches forbidden things such as obscene images and other content is sinful, but it does not invalidate his purity as long as he does not emit Madhiy or the like. We advise the dear questioner to occupy himself with acts of obedience and good deeds, as well as not to follow in the footsteps of Satan.