Memcache refresh issues

hi,

we have 2 web servers (W1 and W2) which are load balanced and each has memcache (M1 and M2). We have limited config data that we store in Memcache. I can edit database values from web browser but when request goes thru UI hits LB and updated only one of memcache. Is there any better solution to handle situation other than forcing reload of all memcaches (Maintaing list of Memcache servers and reloading all).