My kids use Remote 2 in the playroom and more times than not it is slow, unresponsive or flaky. Remote use area is about 27 feet through one wall. I do have the UHF remote "extender" on the DVR. Most of the times if they hold the remote up to their chin it will work. The remote and 722 are about 3 years old. Fresh battteries in the remote. Would a new remote help the problem? Any other ideas? Thanks in advance.