... Methotrexate for over a year. Yesterday, I got to talking with someone who it turns out is a retired chemotherapy nurse. She said that Mx had a bizarre effect on some patients, they couldnt always get their touchscreen devices to work. I CAN'T EITHER! I have gone through 4 smart phones, because I have such a hard time getting the touchscreens to work!!! They work for everyone else just not me!!! My husband said I was too impatient. I called the Rheumy's office and they said they have never heard of such a thing. Has anyone else had this problem???