Android:
Android apps use a memory cache function similar to a Web browser cache. Just as clearing your cache for a website is useful for resolving loading issues, we recommend clearing your app cache.
Open the Settings menu on your device
Select Apps
Tap Heart of Vegas/Cashman Casino/Mighty Fu Casino/Lightning Link in the list of applications
Tap Storage (if applicable)
Tap the Clear data and Clear cache buttons
iOS
iOS devices work differently when it comes to clearing cache. Unlike Android devices, you can't clear the cache of an app from the Settings menu. There are 2 methods you should try when you want to clear the cache
Option 1 - Restart your device
Press and hold the Power Button and Volume Down Button until the power off screen appears
Power off the device
Press and hold the Power Button until the device turns back on
Option 2 - Reinstall the app
From the home screen, find the app you want reinstall
Press and hold on the app until the uninstall option appears
Uninstall the app
Open the App Store and reinstall the app
PC
To clear your browser's cache, follow the link below which has step-by-step instructions: