Reselect only works for these cases:
http://support.f5.com/kb/en-us/products/big-ip_ltm/manuals/product/ltm-concepts-11-1-0/ltm_pools.html
You should configure the system to select a different node in certain cases only, such as:
•When the relevant virtual server is a Performance (Layer 4) virtual server with address translation disabled.
•When the relevant virtual servers Protocol setting is set to UDP.
•When the pool is a gateway pool (that is, a pool or routers)
And yes, I meant reject which sends a reset for TCP connections. Drop would potentially work as it removes the LTM connection table entry and causes LTM to send a reset to the client and pool member on the next packet from either side. Reject just works quicker to get to the same point. No matter which option you select, LTM will start selecting the pool member again for new connections once it's marked up by the monitor(s).
Aaron