As in the title, the trackpad doesn't click well. 15" late 2013 retina with the 2.6ghz/16gb/1TB/750m My cycle count is less than 300. I use it plugged in clamshell mode but recently had to use it on the go and with bootcamp. I realised the trackpad takes a lot of effort to click and does not click anywhere but the bottom. I realise the laptop is not able to sit flat because it is swollen at the base. Anyone else found this? Did Apple replace the battery? I post this because it doesn't seem to be a particularly ubiquitous problem for this model but some users here might pay more attention.