Impurities

Touching a Utensil Before Taking One's Fardh Ghusal

Q: After a wet dream or sexual relation with the wife when ghusal becomes farz, if I touch any utensil like a glass or plate would it become najis? Or I just washed my face then wiped it on a towel then I used this towel after I have a shower, would my ghusal be valid? Or do I have to wash these before I or someone else uses it. I get confused thinking this is wrong that until I have a shower I should not touch anything with wet hands.

Mazi Falling on the Garment

Q: Before going to sleep, very small amount of mazi comes out. After waking up it is impossible to locate exactly which part of the garment has the impurity. What should be done in this case? Can salaah be offered without washing the garment since the mazi is not apparent?