I am the owner of a 7 year old spider. Mine does have slight wobble. Actually technically it is moderate but with a low stress environment he is not displaying symptoms. He does have strike issues still. One of the solutions I have found to striking and missing is to slowly draw him away from his initial point of interest. This seems to get him to calm down a bit and focus on his prey. I basically just dance backward the rat until he comes out in an open spot then i hold it in place and let him strike. On the times he misses i slowly dangle it closer to him. 90% of the time this works without issue.
On those times when he misses more than twice, I always have to go and warm up his prey again to get him to restrike.
I strongly believe it is excitement, neurology, anxiety, and coordination or lack there in. For me and this might be useless to you, I have to get him to focus and calm down before striking. Now on occasion he just is too eager and will throw his entire body at the rat and engulf it but I do try and always get him to concentrate before going in for the kill.
So if this works... get you spider to focus and if needed reheat the prey after repeated misstrikes.