Last weekend's 25-23 defeat in Melbourne - a last-minute penalty putting them down - was not the first time the 89-time capped prop had seen defeat snatched from the jaws of victory.
Back in 2009, when he was in the British & Irish Lions front row, he had the same experience in the second Test in Pretoria.
"It was a little bit of deja vu in Melbourne after the Lions. A last-minute kick and the series gone," said Jenkins, now Wales most capped player after the retirement of Martyn Williams.
"We should have seen the game out in Melbourne. With only two minutes on the clock we should have done something a bit different, but when it's as tight as that it's the responsibility of the 22 to nail it.
"It probably wasn't the best of ideas the kick the ball away, but I thought we had a good chase and pinned them down 30 metres from their line. It was just unfortunate that we gave away two penalties which cost us the game.
"Looking back, I'm sure we could have done better to stop that driving line-out and not pulled it down. It was the last minute of the game, we'd all worked our guts out, but we shouldn't have been down there."
After a two-day break it was back to work for the Welsh squad as the Wallabies announced their team for Sydney.
Fit-again Kurtley Beale is back at full-back and Adam Ashley-Cooper switches to the right wing in place of Cooper Vuna.
Up front, Sitaleki Timani replaces Rob Simmons in the second row in the only change to the pack. But head coach Robbie Deans has gone for a 5-2 split on the bench and dropped last weekend's match winner Mike Harris from the entire matchday 22.
The versatility of Beale, who can play at centre or outside half, has allowed the Wallabies to carry an extra forward among their replacements and that could help as they attempt to quell another second-half revival from the Welsh as they go in search of that elusive southern hemisphere scalp.
"We've taken a bit of time off to reflect on last weekend and to pick ourselves up for the third Test. There's pride in the changing rooms," said Jenkins.
"We didn't get much sleep last Saturday night just thinking about that last kick and how we should have drawn the series. There wasn't much talk in the changing rooms afterwards, but it has been heads down since then as we try to pick ourselves up.
"Last weekend was devastating and we were disappointed in ourselves that we couldn't finish off the game. We had some nice late wins in the season and now we know what it's like to be on the end of a losing game."
Gilbert has released a new line of rugby cleats. The Gilbert Virtuo 8S is part of the exciting new product. Check it out.
The entire All Blacks apparel line has been updated for 2013/14. Check out the New Zealand All Blacks polo.
The Nike Tiempo is a solid rugby cleat and one of few styles still made from full-grain natural leather.
The Gilbert Blitz 8S rugby cleat is a great cleat at a great price of $69.99. Get a new pair of cleats today.
A cool looking all black rugby cleat with the high performance adidas is known for. Get in the Gear!
Wear the crest of the British and Irish Lions on your t-shirt. A great look for the summer.
The All Blacks Performance t-shirt is black with hints of blue from the training jersey. Very Cool.
The New Zealand All Blacks training jersey for 2013/14. Get in the Gear!
The USA Rugby Pro Alternate rugby jersey is perfect for any fan of the Eagles. Get yours to wear during the summer Test matches.
The NEW All Blacks 2013/14 jersey has arrived at World Rugby Shop. Dare to wear the colors of the All Blacks.