well those type of players obviously enjoy bluffing often but then again there's always a chance that they have a genuine hand

You probably loosened up against them and played more hands against them because you knew they were playing a lot of weak hands

but against these type of players you can afford to lose small pots to them because when you catch them and you have a genuine hand that you know you won with, all you have to do is put up a small bet and they'll raise a big ammount to try steal the pot and you can either raise them all-in immediately or call and repeat on the next card that comes on the board