Q: After ios8 update my home button double click become slower :(

Hi Jvhz,

Welcome to Apple Support Communities.

The article linked below provides a lot of great troubleshooting tips that will resolve most Home Button issues like the one you described.

iPhone: Hardware troubleshooting

The Home button is slow to respond

1. If the Home button is slow to respond when exiting one application, try another application.
2. If the issue exists only in certain applications, try removing and reinstalling those applications. Get further assistance in installing and troubleshooting applications.
3. If the issue continues, Try turning iPhone off and then on again. If the iPhone will not restart, try resetting it.
4. If the issue is still happening, try to restore the iPhone.
5. Seek service is the issue is still occurring.

My issue is still not resolved. What do I do next?

Contact Apple Support.

I hope this helps.

-Jason

No problem. 

I'm glad to hear you got it sorted out.