went out to check hives. have two new from last spring, placed sugar blocks and grease patties in each. didnt hear buzzing in one so lifted the top and found about a basebal size group of dead bees in the top deep in the front corner dead. there may be a smaal cluster lower in the boxe so should i leave the hive together, remove the dead cluster in the top? kinda sad about it but i know this can happen....any suggestions?