Here is a twist. Are you absolutely sure that the remote is in fact the problem or is it possible that there is some sort of interference causing a problem? The following took me almost two years to figure out.
Case in point my Grizzly DC and my US made JDS air cleaner. When I built my shop my DC was the first thing installed. The remote operation was hit and miss. Some days it worked some it didn't. Given that the DC is in a separate room and that I knew at some point the remote would never work once the door went on I chalked it up to overseas quality and moved on.
Meanwhile I installed my JDS air cleaner. The remote sort of worked but it was very inconsistent. Even holding the remote 5 feet away pointing right at the IR sensor it would do what it wanted to do. I called JDS they sent out a new receiver and transmitter. Same problem.
One day I only had part of the lights on in the shop and happened to try the remote; the air cleaner came right on and I was able to select the speed and run time
This lead to a bunch of expermention. Both remotes worked flawlessly with the lights off, neither worked reliably with the lights on.
The lights and the air cleaner are on different 120 circuits. DC is 240, none of this was making any sense. Lights are decent quality (read not box store) fixtures with electronic ballasts. My research indicated that this should not be a problem but it was. Ultimately I ended up installing X-10 filters on the lights. The air cleaner remotes works great. The DC IR remote won't shoot through a closed door but I really expected that so I built my own using commercial gate RF equipment.
My suggestion, before condemning the equipment try turning everything in your shop off except for your DC and see if anything changes.
Dave
"Amateur Putzing in Shop."
Northern Wood on Norm 5/07
"Dave's shop is so small you have to go outside to turn around"
Big Dave on my old shop
So I built a new shop. (Picasa went away so did the link to the pictures)