I have used a Tandem X2 for 3 years and have never been able to eliminate occlusion alarms. Fortunately I only get about 1 per week and all I have to do is Resume Insulin. I am on my 4th pump and interestingly, one never had a single occlusion alarm but had to be replaced for a defective T-button. Most of mine happen when the cartridge has about 80-120 units in it.
I believe that there are things to do to reduce the number of occlusion alarms. But I also believe that it is some sort of air or pressure sensor that is defective in some pumps. I get very tired of people who don’t get occlusion alarms thinking that those of us who do are doing something wrong.
I no longer carry my pump in my pocket although that’s how I prefer to carry it. I use TruSteel sets and get occlusion alarms as frequently with those sets as VariSoft sets. One thing that might help is their case but I won’t use it. Another thing I do that is “wrong” is use my cartridges for longer than 3 days. But my occlusions sometimes happen on the second day so they wouldn’t be eliminated by a 3-day change.
I have given up on troubleshooting with Tandem. Most of my alarms happen during boluses but not all. I had one in the middle of the night recently and then quite inconveniently during yoga class and at the movies. I never had an occlusion alarm in 12 years of pumping with Medtronic and Animas so consider this to be a Tandem problem.
Things that might help: 1) Do not carry pump in pocket, 2) Use TruSteel infusion sets, 3) Use Tandem case, 4) Hold tubing out straight during boluses, 5) Don’t use Apidra, 6) Work with your local Tandem rep or trainer and insist on a new pump. Some people are helped by a replacement pump, but I wasn’t. Frankly you get refurbished pumps and you may just get a pump that someone else returned due to occlusion alarms.
In 3 years I have only had 1 day that finally required a cartridge and infusion set change. The rest have all been false. Totally annoying and I have slowly come to accept them because I unfortunately have no choice. I would never switch to Medtronic because I am a committed Dexcom user. And my skin and tissue can’t tolerate Omnipod. And fortunately I mostly like my Tandem pump.