Dislikes (Makrooh)
Doing a Makrooh (disliked) act in Salat causes the full Blessings of Salat to be lost although the Salat will not have to be repeated.
1) Saying Salat bare headed due to laziness or carelessness and to expose the arms above elbow.
2) Playing with clothes or body.
3) Performing Salat in clothes in which people don't ordinally like to go out.
4) To dust the floor with one's hands to prevent the soiling of clothes.
5) Performing Salat when one has the urge for urine or pass stool.
6) To crack one's fingers or putting of fingers of one hand into fingers of the other hand.
7) Turning face away from qibla.
8) For men to rest both arms and wrists on the ground in Sajda.
9) Performing Salat when person facing him sits ahead.
10) Yawning intentionally.
11) Closing eyes (Allowed for concentration)
12) For a mature person to stand alone behind a Saff (row) when there is place in Saff before him.
13) Performing Salat in clothes with pictures of living objects.
14) Performing Salat at a place where there is a picture of a living object around or on the place where he makes Sajda.
15) To count Aayats, Suras or Tasbihs on fingers.
16) Performing Salat with a sheet or clothes wrapped on the body in such a way that it makes it difficult to free hands quickly.
17) To yawn and stretch arms to remove laziness.
18) Do something against Sunnah.
These images are for Illustration only. Please see the following book for reference
Talimul Haq (Hanafee) by Shabbir Ahmad E Desai