There is a feature of the FIX wallet that allows you to automatically combine your rewards as you receive them. Rather than a pile of small rewards, the wallet can be configured to check these amounts and automatically sweep them together, for each wallet address, up to the setting value.
Click "Tools > Debug console"
autocombinerewards true x
or Click "Open Wallet Configuration File"
autocombinerewards=x in your fix.conf file.
These will enable the feature (setting it in your configuration file will require you to restart your wallet to take effect). Periodically the wallet will look for 'dust' in your addresses, and combine them up to the number of coins set in the configuration setting.
autocombinerewards true x will enable a feature that will automatically combine all staking / masternode rewards you receive in to one input, up to the amount that you specify with x. So, if you want your minimum input size to be 10000 FIX, then you would want to run the command in your debug console as follows:
autocombinerewards true 10000. Then any inputs less than 10000 will be swept into a new input, repetitively until the combine threshold is exceeded. Once that threshold is exceeded, the grouping begins with another input. Your wallet MUST be unlocked when a reward is received for this to take effect.
This greatly helps prevent your wallet from getting into a situation where you exceed the max size of a transaction. Instead of having to manually sweep your rewards daily to prevent the transaction too large threshold.
The one important thing to note, however, is that auto combining does incur transaction fees; therefore the small fee will be added each time you receive a stake / masternode reward and it is swept into the combined transaction.
You also can use both
setstakesplitthreshold together to automate the input sizes.
autocombinerewards true 5000 and
stakesplitthreshold 10000 will combine all your inputs for a given address that are actively staking below 5000 FIX until they are over 5000 FIX, but will split them in to two separate inputs when the inputs reach 20000 FIX. Your wallet MUST be unlocked when a reward is received for this to take effect.