I had a terrible skid in a run a while back and noticed soon after a pattern associated with the dreaded skid'. The problem uhh - cured soon after in the same area as before, I began to take notice a pattern, when I set the cue on the table while re-racking the other 14 balls. I would finish the rack and set the cue tip first facing the rack end usually on the left side of the table. So I guess one should be aware of cleaning the table a little extra due to chalk from the tip creating more build up in that particular area. I only practice a couple of days a week now but when I do I am at the table for several hours at least. A good note here I think is when setting the cue on the slate for a re-rack it's a not good to have the tip near the rack end ever, this helps to prevent skids. Just something to consider as a preventive measure, it's a rough way to lose a high run and the chalk does shed on the table when laying the cue down while proceeding to rack. I use a microfiber towel with watered down rubbing alcohol - plus vacuum too, aramith ball cleaner and so on. After the vacuum I then clean the pockets and rails with new towel and again watered down rubbing alcohol (maybe only 5%) is a great cleaning agent and seems to help detour the skids. I hope this helps anyone interested in Straight Pool and not losing a run due to humidity and or chalk build up from the table. 
