Devils Ivy and Peace Lily
I have never owned plants before but bought two plants from B&Q: Devil's Ivy and Peace Lily.
After only two days in my house, the peace lily has browning leaf tips that were not there when I bought it. It's in a south facing room, but several feet in and several feet to the side of a window.

I also bought a Devil's Ivy which I didn't spot in the shop, but has leaves with brown patches and holes. They don't appear to have worsened in my brief ownership. It's located a few feet further into the room away from the other plant.

I watered both plants last night as the soil was dry even 1 to 2 inches in. I watered until the soil was moist and it had just started to drain through the holes in the pot, I then cleared the saucer of water. I can't see anything crawling on the leaves or flying around, no signs of mould or larvae in the soil.
Is there anything to worry about?
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Thank you Tetley.
I did read about misting, but some conflicting things about how often you should do it. I do own one of those bottles actually, as although I said these were my first plants, I do grow herbs on my windowsill and regularly mist those as it seems to help them. I will do the same with the two larger plants!