Lancashire put themselves in a commanding position heading into day three as captain Dane Vilas hit a carer-best 266 to take Lancashire to 544-9 and a lead of 287.
"We bowled really well up front. Jennings played really well and it was great to get him out, but we saw a terrific innings from Dane Vilas who played positively," said Maynard.
"On a ground like this you can take the game away from the opposition, as they scored more than 200 in the last session.
"It was a terrific innings. Every now and again you have to admire that, although I don't think we executed our plans very well.
"There's two days of cricket left and we have to get ourselves in the right frame of mind to get partnerships together, like they did throughout their innings."