It appears some people have very little understanding of what factors are important in table speed...
1. If you are in damp conditions, you should stay away from simonis 860. First of all 860 loses speed fast, but in damp condition turns into a complete rug. This is a commonality with cloths with high wool content. Simonis 760 has more synthetic material and will not only retain its speed through longer of its lifespan, but stands up to damp conditions as well. Granted, it plays like slick ice in the first week or two, but then settles down to a very nice speed. Pros wanted 860 because they play on brand new cloth, and 760 doesn't play well when it's brand new, it needs a week or two to settle down. Once 860 has been on a table for 6-8 months, it becomes soooo slow. 760 you can play until you wear through it. It will still be fast at that point, so long as you vacuum or brush it. If you want a fast table, 760 should be your first choice. All cloths play faster if they are properly stretched.
2. Damp conditions make the ball bounce harder off the rails. If your rails appear dead, and it's damp, they're really, REALLY dead.
3. When you tighten down rail bolts, there is no bonus points for tightening down harder than spec, only downsides. You risk ruining your rails. Find the specs for the table, and follow them around the entire table. After a while you won't need a torque wrench, but in the beginning it's a good idea. On old, beat up tables, you'll often find stripped nuts and rails that won't properly bolt down, because of stupid orangutans who have to try to show how strong they are. Reparing this is tricky and time-consuming.
4. Dead rails...Check that rail bolts are torqued to spec. and that the rail nose is at the proper height. If neither of these are the problem, take cloth off and check if the rubber is loose. Typically, if the glue has come undone, it's time to change the rubber anyway, but in a pinch you can try gluing it back on with contact glue. Installing new rubber is a bit difficult, and not for the faint of heart. You not only need to make sure to get the proper rubber profile, but cutting and glueing it consistently is tough as well. If you have to reprofile your cushions, then you need a pro.