My Google Nexus 7 tablet is running Android version 5.1.1 - the latest the hardware will accept. At times, the device is sluggish and Chrome, Firefox, and the Settings panel occasionally crash, even after a full charge. I have removed every app not in use and driven down the cache. Currently, the internal storage is showing 16.40 GB free out of a total of 27.56 GB. The tablet otherwise functions well. I have seen advice on various sites about resetting by performing a factory reset or using the recovery mode. Everything of importance is stored elsewhere, so a complete erasure is of no concern. What is unclear is whether I would see a performance from either of these procedures. Any advice, including potential downsides, would be appreciated.